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

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...

ghardison · ghardison

I recently tore into a major carburetor repair on a non running 2005 TTR. Took several ultra sonic soaks and a deep soak in some Berrymans. Replaced everything that was included in the all balls rebuild kit. Waiting on diaphragm and check valve then hopefully she'll come back to life. In the meantim...

sslrgrt · sslrgrt

Does anyone know where I can get rear foot pegs for the TTR250 Raid. Apparently they are now required by the MOT if your seat can take 2 people.

glebe74 · glebe74

Hi all, Two weeks ago my blue TTR (2003) was working fine: I did a 135k on/off road trip, parked up and when I went back to the bike a day later it wouldn't start. The starter would turn but there was no spark. Being a lazy sod I took it to my local Yamaha dealer. They did static tests and said the stator was duff...

Dan-in-a-Van · Dan-in-a-Van

I took the TTR down to the local tyre fitters today, to get a new front tyre. Unfortunately they couldn't get the wheel off. The forks on my bike I think are 1998 YZ forks. When the spindle is unscrewed from the left fork leg, the spacer on that side is seized to the spindle. It reaches a point where all its do...

TTRfan · TTRfan

I am stripping an engine and the sprag clutch was really jammed. If you look at the way the bearing assembly has been bent, this sprag kicked back big time! Can't believe it wasn't giving out audible warning signals to the owner well before this happened. I have found the best way to safely unjam the s...

Topic		Started By	Replies	Views	Last Post
	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	675	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	683	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	871	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	682	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	744	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	782	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	910	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	792	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	664	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	931	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	1713	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	706	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	1152	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	1072	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	1294	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	900	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	748	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	1536	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	1262	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	1018	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	737	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	2118	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	1977	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	785	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	810	Nov 11, 2022 by ghardison
	Starter Plunger, where does this seal belong? (Preview) I recently tore into a major carburetor repair on a non running 2005 TTR. Took several ultra sonic soaks and a deep soak in some Berrymans. Replaced everything that was included in the all balls rebuild kit. Waiting on diaphragm and check valve then hopefully she'll come back to life. In the meantim...	ghardison	2	664	Nov 10, 2022 by ghardison
	Rear foot pegs for Raid - now required for MOT (Preview) Does anyone know where I can get rear foot pegs for the TTR250 Raid. Apparently they are now required by the MOT if your seat can take 2 people.	sslrgrt	8	839	Nov 3, 2022 by Forgorin
	Help please: weird starter/no-spark issue (Preview) Hi all, Two weeks ago my blue TTR (2003) was working fine: I did a 135k on/off road trip, parked up and when I went back to the bike a day later it wouldn't start. The starter would turn but there was no spark. Being a lazy sod I took it to my local Yamaha dealer. They did static tests and said the stator was duff...	glebe74	10	899	Oct 31, 2022 by mossproof
	Spindle trouble with YZ forks (Preview) I took the TTR down to the local tyre fitters today, to get a new front tyre. Unfortunately they couldn't get the wheel off. The forks on my bike I think are 1998 YZ forks. When the spindle is unscrewed from the left fork leg, the spacer on that side is seized to the spindle. It reaches a point where all its do...	Dan-in-a-Van	3	689	Oct 31, 2022 by Ttboof
	Another jammed sprag clutch! (Preview) I am stripping an engine and the sprag clutch was really jammed. If you look at the way the bearing assembly has been bent, this sprag kicked back big time! Can't believe it wasn't giving out audible warning signals to the owner well before this happened. I have found the best way to safely unjam the s...	TTRfan	10	1556	Oct 30, 2022 by SRuss67
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