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

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...

mmwain · mmwain

Hi, just brought a spare engine from a UK breaker who'd totally forgotten where it came from. It's not got an engine number, just 4GY stamped on the boss, doesn't appear to have been messed with and no sign that the cases have been replaced unless it was a very long time ago (also unlikely at £2K+ a set!)....

meadus69 · meadus69

Hi guys, Any idea what i am missing that attaches to these fixing points on the LH side of the frame? Im presuming the lower mounts are for a side stand switch that someone has removed? Thanks Tom

RAID · RAID

good evening I'm in need of advice on what might be affecting oil consumption on my '94 raid. when I put it to work it doesn't smoke, every now and then when I accelerate it sends out a "jet" of smoke. What could be causing the excessive oil consumption? thanks

brindabella · brindabella

Hi everybody, the TTR250 is a reliable bike, but like every bike model in manufacturing history, there are areas that need watching - namely nuts and bolts that are prone to loosening (or to freezing in place) or to being stripped or mangled - eg often on parts subject to heat or vibration stress or join...

BikerMat · BikerMat

Hi Guys, I have just recently gotten my carb back together and on the bike - Reason for taking it apart was that it would bog down and die when applying throttle. I've cleaned the jets and put in a new float bowl seal and diaphram o ring seals (Old ones were flattened, diaphram is in good condition). I follo...

ghardison · ghardison

Ok so today I passed some major hurdles on the TTR 250. I finally got the check valve in the mail - inserted it - and finished the carb rebuild. Reinstalled Carb, added fuel and the engine started immediately. It was truly a proud moment. I even started to think well "just maybe". I had halted any ot...

ghardison · ghardison

So all-balls carb rebuild kit didn't provide everything - what size O ring goes on the pilot screw? The one provided is too small. I see I am not the only person to run into this issue - sorry I couldn't find that thread this morning to ask this there. Apologize if I am junking up the place. How do I sear...

Topic		Started By	Replies	Views	Last Post
	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	1251	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	772	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	1982	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	1719	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	1001	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	760	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	776	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	969	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	772	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	832	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	885	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	1005	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	890	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	745	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	1013	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	1975	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	795	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	1237	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	1184	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	1384	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	1015	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	837	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	1732	Jan 12, 2023 by mossproof
	Engine serial number - bike model/country (Preview) Hi, just brought a spare engine from a UK breaker who'd totally forgotten where it came from. It's not got an engine number, just 4GY stamped on the boss, doesn't appear to have been messed with and no sign that the cases have been replaced unless it was a very long time ago (also unlikely at £2K+ a set!)....	mmwain	3	1400	Jan 7, 2023 by TTRfan
	What am i missing? (Preview) Hi guys, Any idea what i am missing that attaches to these fixing points on the LH side of the frame? Im presuming the lower mounts are for a side stand switch that someone has removed? Thanks Tom	meadus69	5	1113	Jan 3, 2023 by meadus69
	Oil consumption RAID 94 (Preview) good evening I'm in need of advice on what might be affecting oil consumption on my '94 raid. when I put it to work it doesn't smoke, every now and then when I accelerate it sends out a "jet" of smoke. What could be causing the excessive oil consumption? thanks	RAID	2	826	Dec 17, 2022 by RAID
	List of problematic nuts and bolts nuts bolts fasteners (Preview) Hi everybody, the TTR250 is a reliable bike, but like every bike model in manufacturing history, there are areas that need watching - namely nuts and bolts that are prone to loosening (or to freezing in place) or to being stripped or mangled - eg often on parts subject to heat or vibration stress or join...	brindabella	6	2198	Dec 10, 2022 by tripodtiger
	Bike dies on idle with choke in. (Preview) Hi Guys, I have just recently gotten my carb back together and on the bike - Reason for taking it apart was that it would bog down and die when applying throttle. I've cleaned the jets and put in a new float bowl seal and diaphram o ring seals (Old ones were flattened, diaphram is in good condition). I follo...	BikerMat	7	2141	Dec 9, 2022 by ghardison
	Before I go ANY FURTHER, are these shavings a show stopper? (Preview) Ok so today I passed some major hurdles on the TTR 250. I finally got the check valve in the mail - inserted it - and finished the carb rebuild. Reinstalled Carb, added fuel and the engine started immediately. It was truly a proud moment. I even started to think well "just maybe". I had halted any ot...	ghardison	3	875	Nov 18, 2022 by Ttboof
	What size O-rings for the Pilot Screw? (Preview) So all-balls carb rebuild kit didn't provide everything - what size O ring goes on the pilot screw? The one provided is too small. I see I am not the only person to run into this issue - sorry I couldn't find that thread this morning to ask this there. Apologize if I am junking up the place. How do I sear...	ghardison	2	921	Nov 11, 2022 by ghardison
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