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

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...

TTRfan · TTRfan

Interesting video. The guy (can't find his name) has built his own powder coating setup very cheaply and, in this video, coats some TTR parts including the barrel from a 350 kit

dlee22 · dlee22

Hi there, has anyone noticed during a rebuild that there top two piston rings are positioned closer together than expected? I noticed this in both the 325 and 350 I split recently but 100% know the 350 was spot on with spacings some 200 miles ago? The 325 had had more miles on and were closely aligned. T...

Rossyboys · Rossyboys

Just for information when you hear that dreaded "Clunk" sound when you stop the engine and your fears of having to replace the Sprag Clutch, its not that harder job. The sound was getting louder and more often when the engine was stopped. 2001 model with 16000km, we are the 4-5 owners looking at the bik...

TerryK · TerryK

Hi all, got an issue with my blue tank speedo drive, yes the speedo does work but when the dike is in the air & I turn the front wheel backward it locks up, I removed the speedo drive & inspected, cleaned it up. the worm gear or pinion had end float & I believe this is causing the lockup. To me it s...

Spyrious · Spyrious

Hello! It seems that the coil lead on my ttr has some internal damage.Sometimes when unplugging and putting it back i get misfires. I have cut a few mm of the end of the lead and screwed the plug cap back in and it cured the problem.But i already had to do it twice now. Is it possible to remove the lead from the...

lybker · lybker

Dear all I am new to the forum, but post here as I hit a strange issue yesterday. I have fitted a TTR 250 engine in my daughters quad bike and have fitted a speeduino ECU and electronic fuel injection. During the mapping phase We did a number of high load runs (2-3 hours) on the dyno to ensure fueling is co...

tripodtiger · tripodtiger

I had mine in and out a few times over the past week. I figured that a video could be useful for others.

Marktheaussie · Marktheaussie

Hey guys, Ran into some trouble with my 93 TTR250.. had to weld my stator cover and when assembling back together I accidentally ran the cables outside the manifold. bike ran for a while but then wires got rubbed by my chain and it stopped. took me a while to track it down, in the meantime I’ve replaced the...

HarleyRigid · HarleyRigid

Just wanted to get an opinion from you guys... I need to put a clutch kit into my '06 TTR250. There are 2 on ebay that have caught my attention. One is Kevlar and the other is cork. Both are fairly close in price, just wondering on the pro's and cons of each. Also if you know of a cheaper or better kit I would app...

Rossyboys · Rossyboys

Hi all, need to replace clutch in a 2001 TTR250 blue frame plastic tank. I live in Sydney Australia. Will do Friction plates, drive plates and springs, ...might as well while cover is off. Brand and store if possible, or link Thanks Grahame

Christos · Christos

Hi guys, I took my 350 on the road and the clutch was slipping under hard acceleration. Everything set according to specs, EBC heavy duty discs and springs, OE six disc basket. The basket has slight notching though. I feel too much power is lost there. What could be the cause? Anyone with a 350 having the...

Gazztop · Gazztop

Good morning, ive Started doing some essential work on my newly bought 2003 blue ttr,it was running terrible so after a full carb rebuild the next job is the Speedo,as that’s essential for me,it wasn’t working at all so I checked the speedo drive hub and it has no internals at all,I’m super skint at t...

Archershome · Archershome

Hello all, going to putting new piston and rings into TTR and wondered how long / running in process is? Any advice would be great. Cheers

TTRfan · TTRfan

https://www.ebay.co.uk/itm/NOS-YAMAHA-3J0-22147-00-00-REAR-SWING-ARM-CHAIN-P...

Gazztop · Gazztop

Hi guys quick question for ya,I’ve just bought this bike and noticed it has a bad oil leak from the top end somewhere,I rode it briefly the other day and it was way too bad,it seemed to be leaking out at pressure,as if there is no crankcase breathers,so I go and investigate,and I can’t find one on there at...

Christos · Christos

I was looking at the clutch diagram from the manual and noticed that part 11 in the photo does not exist (in the manual I have). The photo is from Brian's guide. Is this part for the blue or OE TTRs only? What if it is missing, would it cause a problem? -- Edited by Christos on Friday 8th of July 2022 01:01:10 P...

oshanrube · oshanrube

How long should a chain slider last under normal conditions? I'm referring to the slider near the front spoket. Mine seems to be eating away way too soon, and the chain tension is correct, what other factors can affect this?

Christos · Christos

Hey guys, How often do you check valve clearance? The manual says every 2000 km, isn't that a rather narrow interval?

Bobbler · Bobbler

Ive recently replaced the lower carb o-rings, seal and diaphragm and set up the carb with 50 pilot, I think 142 or 147 main (couldn't read clearly) with pilot screw 2 turns out, twin air filter (snorkel still present) and dominator end can. It starts up almost immediately but the popping on the overru...

oshanrube · oshanrube

Hi all, i noticed that every couple of days the breather cap is coming off and the bike runs bit rough , so my question is can i glue this off? is this something which i will need access to eventually? also how do you usually refill the rear brake reservoir ? its located in a place where its very hard to pour...

dlee22 · dlee22

Hi there, I just finished the 350 rebuild a few weeks ago and took it out for a spin for 15 miles and decided the jetting was too far out. I adjusted to 147 50 bottom clip starts fine, however the down pipe started glowing and therefore running lean. I checked my timing thinking it may be slightly off and i...

Ian Mallows · Ian Mallows

My 1995 model was running great when I did a 200 km ride 3 weeks ago, now it won’t start. I checked spark and compression to find only 65psi. Have checked carby and valve seating plus piston and rings but found nothing apparently wrong. Now out of ideas. ian, Australia

BrianG · BrianG

Hi. Can anyone recommend any folding mirrors for a 2005 Blue? There seems to be a lot of confusion about thread pitch, size and rotation. Thanks

TTRollin · TTRollin

Can anyone tell me what this part is please? I think it’s slowly leaking oil.

INU · INU

newbie here... Read through some of the posts and could not find the info needed. Looking for oil filter for a 93/94 TTR. What other model filters fit this model as cannot seem to easily source original filter using parts number. I was wondering if late model serrow 250 filters are the same. Thanks for...

INU · INU

Hi, Looking for a workshop manual for 93/94 TTR250. I checked some of posts here but they are dated, maybe cause its nearly 30 years old. I am aware that one can purchase one from this forum but the purchasing process is long and to much personal information just to purchase a manual. Does any one have one...

Joss · Joss

Bit more work done to my project ttr. Rear shock serviced and rebuilt and I fitted a grease nipple to the swinging arm.

Joss · Joss

Has anyone ever fitted grease nipple to the suspension linkage ? My xr600 has them and they make looking after the linkage so much easier .

Bjornbsrkr · Bjornbsrkr

This is a bit of a long story, but hopefully someone can see what I am missing…… Two years ago, I was given a 2006 TTR250 for use as an instructor at an off road school. It was a perfect bike spending 50+ hours a week teaching novices to ride - competent at everything and comfortable for my old bones! The bik...

Topic		Started By	Replies	Views	Last Post
	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	1340	Oct 30, 2022 by SRuss67
	DIY powder coating (Preview) Interesting video. The guy (can't find his name) has built his own powder coating setup very cheaply and, in this video, coats some TTR parts including the barrel from a 350 kit	TTRfan	2	718	Oct 6, 2022 by Ridaz
	Piston ring positions (Preview) Hi there, has anyone noticed during a rebuild that there top two piston rings are positioned closer together than expected? I noticed this in both the 325 and 350 I split recently but 100% know the 350 was spot on with spacings some 200 miles ago? The 325 had had more miles on and were closely aligned. T...	dlee22	7	1339	Oct 3, 2022 by JOHNYBOY
	REPLACE SPRAG CLUTCH "STARTER ONE WAY" (Preview) Just for information when you hear that dreaded "Clunk" sound when you stop the engine and your fears of having to replace the Sprag Clutch, its not that harder job. The sound was getting louder and more often when the engine was stopped. 2001 model with 16000km, we are the 4-5 owners looking at the bik...	Rossyboys	5	1708	Sep 22, 2022 by Rubber side down
	Blue tank speedo drive (Preview) Hi all, got an issue with my blue tank speedo drive, yes the speedo does work but when the dike is in the air & I turn the front wheel backward it locks up, I removed the speedo drive & inspected, cleaned it up. the worm gear or pinion had end float & I believe this is causing the lockup. To me it s...	TerryK	2	594	Sep 16, 2022 by TerryK
	Ignition Coil Lead replacement possible? coil lead ignition wire (Preview) Hello! It seems that the coil lead on my ttr has some internal damage.Sometimes when unplugging and putting it back i get misfires. I have cut a few mm of the end of the lead and screwed the plug cap back in and it cured the problem.But i already had to do it twice now. Is it possible to remove the lead from the...	Spyrious	4	751	Sep 11, 2022 by ttr steve
	Help: loss of power in 7000-10000rpm range (Preview) Dear all I am new to the forum, but post here as I hit a strange issue yesterday. I have fitted a TTR 250 engine in my daughters quad bike and have fitted a speeduino ECU and electronic fuel injection. During the mapping phase We did a number of high load runs (2-3 hours) on the dyno to ensure fueling is co...	lybker	3	1113	Aug 19, 2022 by lybker
	Starter motor (Preview) I had mine in and out a few times over the past week. I figured that a video could be useful for others.	tripodtiger	2	616	Aug 14, 2022 by ttr steve
	No spark (Preview) Hey guys, Ran into some trouble with my 93 TTR250.. had to weld my stator cover and when assembling back together I accidentally ran the cables outside the manifold. bike ran for a while but then wires got rubbed by my chain and it stopped. took me a while to track it down, in the meantime I’ve replaced the...	Marktheaussie	0	635	Aug 3, 2022 by Marktheaussie
	Clutch Kit... Kevlar or cork? (Preview) Just wanted to get an opinion from you guys... I need to put a clutch kit into my '06 TTR250. There are 2 on ebay that have caught my attention. One is Kevlar and the other is cork. Both are fairly close in price, just wondering on the pro's and cons of each. Also if you know of a cheaper or better kit I would app...	HarleyRigid	5	1684	Aug 1, 2022 by tripodtiger
	Whats the best clutch Kit to get for a 2001 TTR250 Living in Sydney Australia (Preview) Hi all, need to replace clutch in a 2001 TTR250 blue frame plastic tank. I live in Sydney Australia. Will do Friction plates, drive plates and springs, ...might as well while cover is off. Brand and store if possible, or link Thanks Grahame	Rossyboys	2	553	Jul 29, 2022 by tripodtiger
	350 clutch slipping under hard acceleration (Preview) Hi guys, I took my 350 on the road and the clutch was slipping under hard acceleration. Everything set according to specs, EBC heavy duty discs and springs, OE six disc basket. The basket has slight notching though. I feel too much power is lost there. What could be the cause? Anyone with a 350 having the...	Christos	12	692	Jul 25, 2022 by Jeff B
	Blue bike speedo drive (Preview) Good morning, ive Started doing some essential work on my newly bought 2003 blue ttr,it was running terrible so after a full carb rebuild the next job is the Speedo,as that’s essential for me,it wasn’t working at all so I checked the speedo drive hub and it has no internals at all,I’m super skint at t...	Gazztop	0	519	Jul 22, 2022 by Gazztop
	Running in new piston and rings (Preview) Hello all, going to putting new piston and rings into TTR and wondered how long / running in process is? Any advice would be great. Cheers	Archershome	11	2239	Jul 16, 2022 by James Truro
	Swing arm "chain protector" parts - anyone ever seen these? (Preview) https://www.ebay.co.uk/itm/NOS-YAMAHA-3J0-22147-00-00-REAR-SWING-ARM-CHAIN-P...	TTRfan	1	1615	Jul 15, 2022 by KiwiJeff
	Crankcase breather (Preview) Hi guys quick question for ya,I’ve just bought this bike and noticed it has a bad oil leak from the top end somewhere,I rode it briefly the other day and it was way too bad,it seemed to be leaking out at pressure,as if there is no crankcase breathers,so I go and investigate,and I can’t find one on there at...	Gazztop	13	759	Jul 12, 2022 by KiwiJeff
	Clutch question (Preview) I was looking at the clutch diagram from the manual and noticed that part 11 in the photo does not exist (in the manual I have). The photo is from Brian's guide. Is this part for the blue or OE TTRs only? What if it is missing, would it cause a problem? -- Edited by Christos on Friday 8th of July 2022 01:01:10 P...	Christos	2	570	Jul 11, 2022 by Christos
	Life of a chain slide (Preview) How long should a chain slider last under normal conditions? I'm referring to the slider near the front spoket. Mine seems to be eating away way too soon, and the chain tension is correct, what other factors can affect this?	oshanrube	3	619	Jul 3, 2022 by TerryK
	Valve clearance check (Preview) Hey guys, How often do you check valve clearance? The manual says every 2000 km, isn't that a rather narrow interval?	Christos	27	2975	Jul 1, 2022 by TTRfan
	Popping on deceleration/overrun (Preview) Ive recently replaced the lower carb o-rings, seal and diaphragm and set up the carb with 50 pilot, I think 142 or 147 main (couldn't read clearly) with pilot screw 2 turns out, twin air filter (snorkel still present) and dominator end can. It starts up almost immediately but the popping on the overru...	Bobbler	3	615	Jun 20, 2022 by mossproof
	breather cap coming off (Preview) Hi all, i noticed that every couple of days the breather cap is coming off and the bike runs bit rough , so my question is can i glue this off? is this something which i will need access to eventually? also how do you usually refill the rear brake reservoir ? its located in a place where its very hard to pour...	oshanrube	3	548	Jun 17, 2022 by mossproof
	Cam chain wear/glowing down pipe (Preview) Hi there, I just finished the 350 rebuild a few weeks ago and took it out for a spin for 15 miles and decided the jetting was too far out. I adjusted to 147 50 bottom clip starts fine, however the down pipe started glowing and therefore running lean. I checked my timing thinking it may be slightly off and i...	dlee22	7	1121	Jun 12, 2022 by dlee22
	White TTR250 won’t start, (Preview) My 1995 model was running great when I did a 200 km ride 3 weeks ago, now it won’t start. I checked spark and compression to find only 65psi. Have checked carby and valve seating plus piston and rings but found nothing apparently wrong. Now out of ideas. ian, Australia	Ian Mallows	9	1886	Jun 4, 2022 by Ian Mallows
	Folding mirrors (Preview) Hi. Can anyone recommend any folding mirrors for a 2005 Blue? There seems to be a lot of confusion about thread pitch, size and rotation. Thanks	BrianG	4	718	Apr 21, 2022 by BrianG
	Does anyone know what this part is? (Preview) Can anyone tell me what this part is please? I think it’s slowly leaking oil.	TTRollin	3	802	Mar 26, 2022 by TTRollin
	Steel tank oil filter needed. (Preview) newbie here... Read through some of the posts and could not find the info needed. Looking for oil filter for a 93/94 TTR. What other model filters fit this model as cannot seem to easily source original filter using parts number. I was wondering if late model serrow 250 filters are the same. Thanks for...	INU	3	591	Mar 26, 2022 by Christos
	Workshop manual (Preview) Hi, Looking for a workshop manual for 93/94 TTR250. I checked some of posts here but they are dated, maybe cause its nearly 30 years old. I am aware that one can purchase one from this forum but the purchasing process is long and to much personal information just to purchase a manual. Does any one have one...	INU	3	1077	Mar 24, 2022 by INU
	Shock rebuild (Preview) Bit more work done to my project ttr. Rear shock serviced and rebuilt and I fitted a grease nipple to the swinging arm.	Joss	3	679	Mar 13, 2022 by JOHNYBOY
	Grease nipples !!!! (Preview) Has anyone ever fitted grease nipple to the suspension linkage ? My xr600 has them and they make looking after the linkage so much easier .	Joss	2	803	Feb 24, 2022 by Joss
	What am I missing? (Cranks, won’t start) (Preview) This is a bit of a long story, but hopefully someone can see what I am missing…… Two years ago, I was given a 2006 TTR250 for use as an instructor at an off road school. It was a perfect bike spending 50+ hours a week teaching novices to ride - competent at everything and comfortable for my old bones! The bik...	Bjornbsrkr	9	969	Feb 18, 2022 by TTR2501966
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