A forum for owners of Yamaha TTR250 trail and enduro bikes!

TTRfan · TTRfan

Does anyone have a Yamaha part number (and/or price) for the TTR decompressor kit please? I have "collected" a kit and have a buyer interested but can't find details on the web. No part number on the packets which is odd. Also, has anyone got a decompressor fitted and can tell me where the par...

l0k1rider · l0k1rider

Like many other users I have never really solved the problem of a dragging front brake on my TTR250, I have other bikes but have no problems with the brakes. I could service it, but it would soon start dragging again, wearing out pads & disc. I finally realized the problem could not be solved with the...

dlee22 · dlee22

Hi all, We have made it to Boliva on this trip and are doing some of the best trails and unpaved roads on the trip so far! Sadly Robbie's ruined her old shock and it shot all the oil out, bit of a shame! Quite lucky it was now rather than in a few weeks time as we are planning on riding to Manaus, Brazil which is...

Fluster · Fluster

Hi, I noticed an oil leak only when the bike was running. I think it's coming from the cover where the start connects to the engine. I've had a look at the O-ring and it appears to be fine but I've ordered a replacement anyway (2mm Section 76mm Bore NITRILE 70 Rubber O-Rings from Simply Bearings) to be on th...

Nic_B · Nic_B

Hi All Trying to nut out the correct wiring for the Speedo, warning lamps, indicator and headlamp switches etc.... I don't have a genuine speedo on the bike and I am trying to wire up some warning lights, Ign, Lamps, Neutral etc... Have the workshop manual, yet other than the headlamp wiring I can't fin...

TTRfan · TTRfan

A simple tip that I got from Steve at Totally TTRs. Slip a rubber glove over the air intake when you are doing a full power wash Depending on how muddy the conditions are that you ride in, it is worth occasionally taking off the side panels, seat, rear mudguard, tank, battery box and headlight to give the...

PaulFoxton · PaulFoxton

Oops! Had a bit of an off today and have smashed the speedo and broken off the warning light assembly too (as well as knackered the cowl). Does anyone have any ideas for replacement, since I assume I won't be able to get stock replacements easily. I know I can change to an aftermarket digital speedo and p...

d0wse · d0wse

Hello just joined the forum, used the search function to no real help. Purchased a 1999 USDM 250 a couple weeks back. I had a 225 and loved it, so I was hoping to jump to its...

650Katman · 650Katman

Hi there, i got back home from a ride recently and discovered the top roller and it's mounting have left the TTR. Could anyone help with some dimensions or some kind of template so i can get a mount sorted and fit a new roller. Many thanks

bkellzy · bkellzy

Curious what oil I should be using in my bike? It’s a 2003 Yamaha TTR 250. Owners manual says 10w-30 or 20w-40 (depending on outside temperature?) I know a lot of you guys on this forum are using 10w-40 semi-synthetic. I recently spoke to a Yamaha Service representative and he said he wouldn’t use 10w-4...

TTRHead · TTRHead

hello everyone, I have a 2004 TTR that I am tinkering around with at the moment that smells of petrol, closer inspection has revealed the carb is getting wet around the diaphragm cover area, the Bike runs and rides fine, anyone else has this issue -- Edited by TTRHead on Monday 22nd of July 2019 02:54:53...

Crocker · Crocker

Morning all, Just wondering if anyone has any experience of successfully upgrading the suspension on their bikes? The front end tends to be a bit twitchy with the whole set up being very soft. I know it’s a trail bike, but the front does tend to ‘dive’. Can you buy upgraded springs in the UK? I’m around 90...

tiddler · tiddler

I’ve managed to rip the wires out of the back of the clutch switch. My TTR will now only start if it’s in neutral. Logic says I should be able to join the two wires together and make it so it will start in neutral and in gear whether the clutch is pulled in or not. I’ve tried that as a temporary solution but the b...

dlowenst · dlowenst

Following on my earlier post, I have removed the head, barrel and piston and determined that the existing piston is a Wiseco 4689M07350, which is 73.5 mm nominal (0.5mm over stock). While I fully recognize that it may make sense to replace the piston regardless, for diagnostic purposes I want to veri...

baisleyde · baisleyde

My bike really runs perfect , but when I go down steep hills (like so steep I'm skidding on two wheels and really cant stop) , the bike will flood out , I have to open the throttle a bit to get to start again. I really don't know what it could be , possibly float level ? I have never had an issue like this with any o...

bryo62 · bryo62

Hello all, New member. I just picked up a 2004 TTR250. I haven't ridden the bike yet. Going through it now. It has a mangled carburetor, PO broke float bowl post and I'm working on that. Anyways I have another issue I think. See below. I see a lot of threads about draining battery with key off but my...

Ttboof · Ttboof

A couple of years ago I fitted the ebc heavy duty cluch . I'm finding the lever pull too firm . Anyone tried going back to original springs with the new plates

Jamie_w · Jamie_w

I recently bought my first TTR OE (through the forum and from member Rob). I took it out on it's first outing recently and i'm surely converted! Now, I'm 6"5 and about 100KG and wondered if any one had advice for modifications for a vertically abnormal height such as mine? My local garage pumped up the f...

DTRAL · DTRAL

Hoping for a quick answer since I have yet to dl a shop or Haynes manual... I'm planning to order a hydraulic pressure switch for my rear brake light, and I'm seeing two different thread pitches available... .0 and 1.25. Does anyone know the thread pitch offhand? Replacing this part on the bike- Part...

dlowenst · dlowenst

About to start a top-end rebuild on my '06 U.S.-spec TT-R250. I've done a limited degree of poking around and haven't found many complete kits (piston, rings, gaskets, etc.), but I do see the Wossner piston kit and Athena gasket kits via several sources including TotallyTTRs, plus a few other option...

650Katman · 650Katman

My standard exhaust on white oe has a hole by mounting bracket nr header pipe. It's been welded up twice. So looking for a fairly cheap replacement. I've seen posts about yz 250 r silencer but is it an easy fit? I've also seen an American ttr exhaust on eBay . I'd love one of the stainless ones from totally t...

gpower07 · gpower07

OD is 36MM and 44MM. is that correct? mine still running. and i don't want to take it out. in case someone knew the size here. that what i found. https://www.ebay.com/itm/144736843420?mkevt=1&mkpid=0&emsid=e11051.m43.l1123&mkcid=26&ch=osgood&euid=82630cbd5e85...

Nomada_Firefox · Nomada_Firefox

Just it, my 2005 original battery, a lead-acid battery is dying, it recharges with a battery charger but at 15 days, it lost almost all the power. Any suggestions about a battery model? I was checking in a official Yamaha store and the original has this number 4UC821000100 , can anybody tell me if it is t...

James B · James B

Hey folks, I picked up this 07 TTR with Motard wheels on it a year and a half ago. Cut to 6 months later and the bike is stolen from my apartment building. C'est la vie. It's gone, I thought. A call from the cops a few weeks ago however had my TTR back in my apartment garage again (locked this time!). Problem i...

ttboof · ttboof

Hi got an eBay delivery today and fitted a set of blue stubby pivot levers to the ttr will post pics and feed back soon Ran out of mods so tried a bit of bling -- Edited by ttboof on Friday 20th of September 2019 10:19:40 AM

meadus69 · meadus69

Hi guys, just got my 2005 Up and running after a tidy up in the workshop. Starts lovely and runs well from cold. Left it to warm up to change the oil but once warm it smokes quite a bit, puffs as it is revved I would say white or blue. Im not sure how old the fuel is but I will change this. was thinking of doing a co...

sammyttr · sammyttr

my banjo bolt on the clutch cover under the exhaust is just spinning won't tighten up at all, gutted any knows best way to fix it easily and cheapily.

meadus69 · meadus69

I am finishing up re-assembling my 2005 after an overhaul. connected the rear indicators back up and the rh one works fine but the lh flashes too fast. front indicators all connected as they should and everything lighting up, just lh is flashing much faster. dodgy flasher relay? I have some LED re...

ghardison · ghardison

Ok I have removed and cleaned the carb 4 times. I know what you all are thinking and I now too have the benefit of experience. "dude you should have cleaned the tank as one of the first steps to getting a bike that has been sitting with fuel in it for 5 to 6 years!!!" The tank is full of crap! I have a 2006 TTR blu...

ghardison · ghardison

Hey guys hope all is well and happy new year! So my TTR is running leaner than an Olympic marathoner. White spark plug and no carbon build up. New spark plug. The header is glowing red yadda yardda. This is a 2005 TTR 250 US/CA model. I am once again cleaning the carb and checking jet sizes. I will send t...

Topic		Started By	Replies	Views	Last Post
	Decompressor kit SOLD SOLD SOLD! (Preview) Does anyone have a Yamaha part number (and/or price) for the TTR decompressor kit please? I have "collected" a kit and have a buyer interested but can't find details on the web. No part number on the packets which is odd. Also, has anyone got a decompressor fitted and can tell me where the par...	TTRfan	10	3825	Jul 18, 2023 by TWR250funbike
	Front brake dragging. Problem solved after nearly 10 years. (Preview) Like many other users I have never really solved the problem of a dragging front brake on my TTR250, I have other bikes but have no problems with the brakes. I could service it, but it would soon start dragging again, wearing out pads & disc. I finally realized the problem could not be solved with the...	l0k1rider	2	1011	Jul 14, 2023 by l0k1rider
	Rear shock oil leak (Preview) Hi all, We have made it to Boliva on this trip and are doing some of the best trails and unpaved roads on the trip so far! Sadly Robbie's ruined her old shock and it shot all the oil out, bit of a shame! Quite lucky it was now rather than in a few weeks time as we are planning on riding to Manaus, Brazil which is...	dlee22	8	946	Jul 13, 2023 by dlee22
	Oil leak from starter motor cover (Preview) Hi, I noticed an oil leak only when the bike was running. I think it's coming from the cover where the start connects to the engine. I've had a look at the O-ring and it appears to be fine but I've ordered a replacement anyway (2mm Section 76mm Bore NITRILE 70 Rubber O-Rings from Simply Bearings) to be on th...	Fluster	3	1089	Jul 9, 2023 by TTRfan
	Wiring Diagram, Dash, and control switches. (Preview) Hi All Trying to nut out the correct wiring for the Speedo, warning lamps, indicator and headlamp switches etc.... I don't have a genuine speedo on the bike and I am trying to wire up some warning lights, Ign, Lamps, Neutral etc... Have the workshop manual, yet other than the headlamp wiring I can't fin...	Nic_B	1	1556	Jul 2, 2023 by mossproof
	Tips - how to keep water out of the airbox when power washing your TTR - and other tips! (Preview) A simple tip that I got from Steve at Totally TTRs. Slip a rubber glove over the air intake when you are doing a full power wash Depending on how muddy the conditions are that you ride in, it is worth occasionally taking off the side panels, seat, rear mudguard, tank, battery box and headlight to give the...	TTRfan	3	939	Jun 14, 2023 by TTRfan
	Options to replace speedo assembly and warning lights (Preview) Oops! Had a bit of an off today and have smashed the speedo and broken off the warning light assembly too (as well as knackered the cowl). Does anyone have any ideas for replacement, since I assume I won't be able to get stock replacements easily. I know I can change to an aftermarket digital speedo and p...	PaulFoxton	9	1019	Jun 7, 2023 by TTRfan
	Electrical help/measurements CDI Electrical Breakup Tune (Preview) Hello just joined the forum, used the search function to no real help. Purchased a 1999 USDM 250 a couple weeks back. I had a 225 and loved it, so I was hoping to jump to its...	d0wse	1	1335	Jun 7, 2023 by TTRfan
	Top roller has departed (Preview) Hi there, i got back home from a ride recently and discovered the top roller and it's mounting have left the TTR. Could anyone help with some dimensions or some kind of template so i can get a mount sorted and fit a new roller. Many thanks	650Katman	3	813	May 28, 2023 by Ttboof
	Oil Type - 2003 Yamaha TTR 250 (Preview) Curious what oil I should be using in my bike? It’s a 2003 Yamaha TTR 250. Owners manual says 10w-30 or 20w-40 (depending on outside temperature?) I know a lot of you guys on this forum are using 10w-40 semi-synthetic. I recently spoke to a Yamaha Service representative and he said he wouldn’t use 10w-4...	bkellzy	5	2112	May 25, 2023 by KiwiJeff
	Carb leak (Preview) hello everyone, I have a 2004 TTR that I am tinkering around with at the moment that smells of petrol, closer inspection has revealed the carb is getting wet around the diaphragm cover area, the Bike runs and rides fine, anyone else has this issue -- Edited by TTRHead on Monday 22nd of July 2019 02:54:53...	TTRHead	6	1777	May 8, 2023 by TbirdX
	2003 TTR Suspension Upgrades (Preview) Morning all, Just wondering if anyone has any experience of successfully upgrading the suspension on their bikes? The front end tends to be a bit twitchy with the whole set up being very soft. I know it’s a trail bike, but the front does tend to ‘dive’. Can you buy upgraded springs in the UK? I’m around 90...	Crocker	4	1051	May 5, 2023 by Ttboof
	Clutch switch (Preview) I’ve managed to rip the wires out of the back of the clutch switch. My TTR will now only start if it’s in neutral. Logic says I should be able to join the two wires together and make it so it will start in neutral and in gear whether the clutch is pulled in or not. I’ve tried that as a temporary solution but the b...	tiddler	2	804	Apr 17, 2023 by ttr steve
	Wiseco Piston Clearances (Preview) Following on my earlier post, I have removed the head, barrel and piston and determined that the existing piston is a Wiseco 4689M07350, which is 73.5 mm nominal (0.5mm over stock). While I fully recognize that it may make sense to replace the piston regardless, for diagnostic purposes I want to veri...	dlowenst	2	843	Apr 14, 2023 by TTRfan
	Bike stalls on extremly steep downhills (Preview) My bike really runs perfect , but when I go down steep hills (like so steep I'm skidding on two wheels and really cant stop) , the bike will flood out , I have to open the throttle a bit to get to start again. I really don't know what it could be , possibly float level ? I have never had an issue like this with any o...	baisleyde	5	1017	Apr 5, 2023 by TTRfan
	Leaving key on drains battery (Preview) Hello all, New member. I just picked up a 2004 TTR250. I haven't ridden the bike yet. Going through it now. It has a mangled carburetor, PO broke float bowl post and I'm working on that. Anyways I have another issue I think. See below. I see a lot of threads about draining battery with key off but my...	bryo62	2	817	Apr 2, 2023 by bryo62
	Ebc heavy duty clutch too heavy ? (Preview) A couple of years ago I fitted the ebc heavy duty cluch . I'm finding the lever pull too firm . Anyone tried going back to original springs with the new plates	Ttboof	6	882	Apr 2, 2023 by Jeff B
	Tall boy modifications and general advice (Preview) I recently bought my first TTR OE (through the forum and from member Rob). I took it out on it's first outing recently and i'm surely converted! Now, I'm 6"5 and about 100KG and wondered if any one had advice for modifications for a vertically abnormal height such as mine? My local garage pumped up the f...	Jamie_w	5	1039	Mar 17, 2023 by TTRfan
	Rear Master Cyl - Banjo Bolt Thread Pitch? (Preview) Hoping for a quick answer since I have yet to dl a shop or Haynes manual... I'm planning to order a hydraulic pressure switch for my rear brake light, and I'm seeing two different thread pitches available... .0 and 1.25. Does anyone know the thread pitch offhand? Replacing this part on the bike- Part...	DTRAL	8	1059	Mar 16, 2023 by TTRfan
	Top-End Rebuild Parts Kits (Preview) About to start a top-end rebuild on my '06 U.S.-spec TT-R250. I've done a limited degree of poking around and haven't found many complete kits (piston, rings, gaskets, etc.), but I do see the Wossner piston kit and Athena gasket kits via several sources including TotallyTTRs, plus a few other option...	dlowenst	3	939	Mar 12, 2023 by TTRfan
	Silencer replacement (Preview) My standard exhaust on white oe has a hole by mounting bracket nr header pipe. It's been welded up twice. So looking for a fairly cheap replacement. I've seen posts about yz 250 r silencer but is it an easy fit? I've also seen an American ttr exhaust on eBay . I'd love one of the stainless ones from totally t...	650Katman	2	788	Mar 12, 2023 by 650Katman
	2006 TTR Carburetor size (Preview) OD is 36MM and 44MM. is that correct? mine still running. and i don't want to take it out. in case someone knew the size here. that what i found. https://www.ebay.com/itm/144736843420?mkevt=1&mkpid=0&emsid=e11051.m43.l1123&mkcid=26&ch=osgood&euid=82630cbd5e85...	gpower07	2	1064	Mar 10, 2023 by TTRfan
	My TTR250 original battery is dying, what type of replacement do you recomend? (Preview) Just it, my 2005 original battery, a lead-acid battery is dying, it recharges with a battery charger but at 15 days, it lost almost all the power. Any suggestions about a battery model? I was checking in a official Yamaha store and the original has this number 4UC821000100 , can anybody tell me if it is t...	Nomada_Firefox	5	2274	Mar 2, 2023 by tom13
	Got back my stolen TTR. With some modifications... (Preview) Hey folks, I picked up this 07 TTR with Motard wheels on it a year and a half ago. Cut to 6 months later and the bike is stolen from my apartment building. C'est la vie. It's gone, I thought. A call from the cops a few weeks ago however had my TTR back in my apartment garage again (locked this time!). Problem i...	James B	1	842	Feb 27, 2023 by texasT
	New levers (Preview) Hi got an eBay delivery today and fitted a set of blue stubby pivot levers to the ttr will post pics and feed back soon Ran out of mods so tried a bit of bling -- Edited by ttboof on Friday 20th of September 2019 10:19:40 AM	ttboof	13	1292	Feb 27, 2023 by TerryK
	Bike smoking when warmed up (Preview) Hi guys, just got my 2005 Up and running after a tidy up in the workshop. Starts lovely and runs well from cold. Left it to warm up to change the oil but once warm it smokes quite a bit, puffs as it is revved I would say white or blue. Im not sure how old the fuel is but I will change this. was thinking of doing a co...	meadus69	7	1244	Feb 1, 2023 by meadus69
	oil feed banjo (Preview) my banjo bolt on the clutch cover under the exhaust is just spinning won't tighten up at all, gutted any knows best way to fix it easily and cheapily.	sammyttr	9	1434	Jan 28, 2023 by dlee22
	Indicators (Preview) I am finishing up re-assembling my 2005 after an overhaul. connected the rear indicators back up and the rh one works fine but the lh flashes too fast. front indicators all connected as they should and everything lighting up, just lh is flashing much faster. dodgy flasher relay? I have some LED re...	meadus69	2	1062	Jan 23, 2023 by meadus69
	Fuel tank is my culprit!!! (Preview) Ok I have removed and cleaned the carb 4 times. I know what you all are thinking and I now too have the benefit of experience. "dude you should have cleaned the tank as one of the first steps to getting a bike that has been sitting with fuel in it for 5 to 6 years!!!" The tank is full of crap! I have a 2006 TTR blu...	ghardison	6	884	Jan 16, 2023 by ghardison
	Valve clearances (Preview) Hey guys hope all is well and happy new year! So my TTR is running leaner than an Olympic marathoner. White spark plug and no carbon build up. New spark plug. The header is glowing red yadda yardda. This is a 2005 TTR 250 US/CA model. I am once again cleaning the carb and checking jet sizes. I will send t...	ghardison	7	1837	Jan 12, 2023 by mossproof
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