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

TTRfan · TTRfan

Riddle me this! I am just stripping apart an engine that I bought as part of a job lot many years ago and I have no idea as to its background. It's from a metal-tanked bike as it has the extension on the transmission shaft for a magnet plus its number is 4GY whereas the blue TTRs invariably have a 4PX engine n...

dlee22 · dlee22

Hi all, hope you all had a good Christmas. When my bike is idling my bikes at a nice 13.5 volts. (Fully charged battery on the bike), when I ride it the voltage drops to 6-9v but then goes back up to 13.5 volts when on a lower but steady throttle. I'll pull the generator off and try to check it out, has anyone...

ttr steve · ttr steve

My battery keeps draining a bit when I am not using the bike for long periods of time 😑 so today I fitted a new regulator, hopefully it will fix the problem

It must be that as all the USB charging socket and heated grips have an off switch fitted. The battery is new as well

Whilst I had the Acerbic tank...

vwanjau · vwanjau

Hi Team, I am having an electrical issue with my Bike TTR 250 1994 model. Started with the start button having a hard time to start the bike, then when to the headlight not working, then spread to the indicator lights. The Dashboard Odometer and the break light were the last components to die. Now the bik...

dlee22 · dlee22

Hi all, My girlfriend has nearly got her ttr250 raid ready for the mot but the one thing being a pain is the front brake light. The rear brake is fine so we know the rear is okay. The if I replace the front switch (with an aftermarket) it makes no difference. I disconnected the electrical block connector...

GzC59 · GzC59

Hi Folks, would appreciate a bit of advice on this if possible. The riding experience on my 05 TTR is best described as "clunky" with respect to the throttle take up, smooth and progressive it is not. Don't think it has ever been really smooth since I've owned it, but I would expect everyone here who ride...

ttboof · ttboof

I noticed the speedo cable was rubbing into the lower fork tube. I've put a bit of tape behind it to stop the wear The notch is pretty deep close to 80,000ks on it though

ttr steve · ttr steve

I have been asked a lot about this lately, so I thought I would re post my old solution to a cheap starter motor repair. Hi I have been doing a lot of maintenance on my bike lately, and have spent quite a few pounds. Now my starter motor has packed up, shredded gears, done the sprag and large idler gear, then...

vwanjau · vwanjau

Hi Guys, I have got an oil leak on my Engine and silicon cant seem to sort the issue. What do I need to replace? The top gasket only ? Also when I rev the bike hard, I can see smoke from the exhaust. What should I check for here? Kind Regards

nugget68 · nugget68

Hey guys, new here, been reading up on a few posts. I am going to look at a 2005 TTR 250 today, gonna possibly trade some stuff for it which would put me about $550 in the bike if I decide to trade. The bike is currently not running, owner said the timing tensioner failed, but was running last week, he said it h...

TTRfan · TTRfan

I was cleaning up a clutch cover from a blue TTR and thought I would check the crankshaft end oil seal. I was surprised at how hard the seal material was and how worn the inside looked so I dug it out to have a look. The inner diameter measured just over 14mm and it fits over a 14mm end of the crankshaft so not i...

SussexTony · SussexTony

My boy came back from a ride ( private land) and said that the bike battery died witch seems mad because I’ve just fitted a new battery, starter motor, and sprag, because it started to bang when switching off engine, so today we had a look and when I put multi meter on battery it said 12: 7 v battery ok! So th...

ttboof · ttboof

Replaced another set of wheel bearings. They were a bit reluctant to come out and the spacer got a bit messed up. Leaving it a tad shorter than it should be I went to order a new one but it's a three month wait Over night I've tidied the end up and but a bit of metal putty on the end now all good until the new one...

Base · Base

I had to reset my Trail Tech speedo recently and have the options to enter some indication points for high rev range during gear changes. I've had a quick search but didn't find anything conclusive. It has the option to flash LED lights to change gears. Has options for High rev range and Danger. Any idea...

TTRfan · TTRfan

A mate gave me this tip and it seems to have worked! My airbox intake boot is a tight fit and it is sometimes difficult to get it to sit fully on the carb. One remedy might be (a) to find some pipe that is a tight fit in the mouth of the boot, (b) cramp it in tight. (c) pour really hot water over the boot, (d) pull ha...

little_wing · little_wing

https://www.rockymountainatvmc.com/parts/tusk-crankcase-splitter-p

SussexTony · SussexTony

how long do sprag clutches last ,

jaobedoza · jaobedoza

So how do we repalce them? High beam indicator is dead. Thanks very much!

SussexTony · SussexTony

I’ve just taken my bike apart to do the sprag clutch and i noticed that everting looked ok , except the starter spline looked really bad , so I’ve ordered a new starter motor, so I thought I would look on ttr thred and just noticed that there was no washers ( shins) on idol gear that got to be why sounds so bad !...

Looney · Looney

2006TTR 250, set for a couple years in friends garage, was given to me. I cleaned carb and changed oil and air filter and put a new battery in it, it would run on idle with the choke pulled out but would die upon giving any amount of throttle. I bought and replace all new jets and still the same issue. it ru...

SussexTony · SussexTony

How my miles , or how long do I need to run my new wiseco piston kit in for?

little_wing · little_wing

hey all, so i have a 2006 ttr250. I live in ontario canada. so 2006 was the last year for the 250 in this part of the world. this bike was the first dirt bike that i rode and started my love for offroad riding. the bike has an estimate of 500-600 hours the motor has never been opened. other then to check the valv...

little_wing · little_wing

hello all. bike was running ok. then stalled.. battery was dead. would not bump start. pushed bike back to the car. tried booster cables to car battery. i just get relay click when i touch the electric start button. tryied giving 12 volts directly to starter 12volt input. no sound or even sparks. i put t...

TbirdX · TbirdX

Wondered why the garage was smelling of juice lately, I think it may be down to this... Slight weep of petrol from this joint I think. New gaskets or carb off to try and tighten the screws in the bottom up?

TTRfan · TTRfan

I know that it is a good idea to change brake fluid every few years but hadn't appreciated quite how old fluid can deteriorate over time until I opened a front brake master cylinder/reservoir today. I had already removed quite a bit of coagulated nasty gunk before I thought to take a couple of photos. Yu...

purdoy25 · purdoy25

Hello. I have an old and rather excessively modified non-running TTR250 that I've set aside because of all the issues it kept getting. I'm wondering if it's even worth fixing this thing as I've already sank over $1000 on repairs alone and it still keeps getting issues. This thing has lived in the mecha...

jaobedoza · jaobedoza

Seems previous owner used epoxy to stop a leak.

boris04300 · boris04300

Hello everyone, just bought a TTR from 2005 but the speedometer was not mounted. Now I try to put it back but it seems not to fit (the holes are not aligned). Can one of you take a picture of the mounting points of the speedometer so I understand how it should me mounted? Thanks in advance for your help! Bori...

PaulFoxton · PaulFoxton

Just recorded a vid of my TTR - just got it last week. Sometimes there's a heavy clunk when I kill the engine, sometimes no clunk, sometimes just a small one. I'm hoping someone with experience of these things can shed some light. Thanks, Paul -- Edited by PaulF...

Coley · Coley

Heidenau K60 in 130/80/18 on the left. Pirelli MT21 in 120/80/18 Michelin Tracker in 100/100/18 on the right. These are the only tyres I've tried so far so the comments are relative to these three tyres in UK conditions. I am searching for a green lane/TET tyre. Heidenau's were comfortable and fun on r...

Topic		Started By	Replies	Views	Last Post
	A breathing issue! (Preview) Riddle me this! I am just stripping apart an engine that I bought as part of a job lot many years ago and I have no idea as to its background. It's from a metal-tanked bike as it has the extension on the transmission shaft for a magnet plus its number is 4GY whereas the blue TTRs invariably have a 4PX engine n...	TTRfan	2	652	Jan 2, 2021 by TTRfan
	Voltage drop (Preview) Hi all, hope you all had a good Christmas. When my bike is idling my bikes at a nice 13.5 volts. (Fully charged battery on the bike), when I ride it the voltage drops to 6-9v but then goes back up to 13.5 volts when on a lower but steady throttle. I'll pull the generator off and try to check it out, has anyone...	dlee22	8	817	Dec 28, 2020 by TTRfan
	Battery drain when bike not in use (Preview) My battery keeps draining a bit when I am not using the bike for long periods of time 😑 so today I fitted a new regulator, hopefully it will fix the problem It must be that as all the USB charging socket and heated grips have an off switch fitted. The battery is new as well Whilst I had the Acerbic tank...	ttr steve	19	1223	Dec 21, 2020 by ttr steve
	Electrical Issues (Preview) Hi Team, I am having an electrical issue with my Bike TTR 250 1994 model. Started with the start button having a hard time to start the bike, then when to the headlight not working, then spread to the indicator lights. The Dashboard Odometer and the break light were the last components to die. Now the bik...	vwanjau	15	1165	Dec 20, 2020 by dlee22
	Front brake light (Preview) Hi all, My girlfriend has nearly got her ttr250 raid ready for the mot but the one thing being a pain is the front brake light. The rear brake is fine so we know the rear is okay. The if I replace the front switch (with an aftermarket) it makes no difference. I disconnected the electrical block connector...	dlee22	9	892	Dec 15, 2020 by dlee22
	Throttle Take Up (Preview) Hi Folks, would appreciate a bit of advice on this if possible. The riding experience on my 05 TTR is best described as "clunky" with respect to the throttle take up, smooth and progressive it is not. Don't think it has ever been really smooth since I've owned it, but I would expect everyone here who ride...	GzC59	5	993	Dec 14, 2020 by TTRfan
	Something to keep an eye on (Preview) I noticed the speedo cable was rubbing into the lower fork tube. I've put a bit of tape behind it to stop the wear The notch is pretty deep close to 80,000ks on it though	ttboof	2	1060	Dec 8, 2020 by ttboof
	Starter motor repair, using FZR 600 Starter motor (Preview) I have been asked a lot about this lately, so I thought I would re post my old solution to a cheap starter motor repair. Hi I have been doing a lot of maintenance on my bike lately, and have spent quite a few pounds. Now my starter motor has packed up, shredded gears, done the sprag and large idler gear, then...	ttr steve	14	7803	Dec 7, 2020 by JOHNYBOY
	Oil Leak (Preview) Hi Guys, I have got an oil leak on my Engine and silicon cant seem to sort the issue. What do I need to replace? The top gasket only ? Also when I rev the bike hard, I can see smoke from the exhaust. What should I check for here? Kind Regards	vwanjau	2	895	Dec 3, 2020 by vwanjau
	Project Bike (Preview) Hey guys, new here, been reading up on a few posts. I am going to look at a 2005 TTR 250 today, gonna possibly trade some stuff for it which would put me about $550 in the bike if I decide to trade. The bike is currently not running, owner said the timing tensioner failed, but was running last week, he said it h...	nugget68	2	810	Dec 2, 2020 by nugget68
	Crankshaft end oil seal (Preview) I was cleaning up a clutch cover from a blue TTR and thought I would check the crankshaft end oil seal. I was surprised at how hard the seal material was and how worn the inside looked so I dug it out to have a look. The inner diameter measured just over 14mm and it fits over a 14mm end of the crankshaft so not i...	TTRfan	3	890	Nov 26, 2020 by ttr steve
	Hard starter (Preview) My boy came back from a ride ( private land) and said that the bike battery died witch seems mad because I’ve just fitted a new battery, starter motor, and sprag, because it started to bang when switching off engine, so today we had a look and when I put multi meter on battery it said 12: 7 v battery ok! So th...	SussexTony	16	702	Nov 26, 2020 by TTRfan
	Rear wheel spacer kind of fix (Preview) Replaced another set of wheel bearings. They were a bit reluctant to come out and the spacer got a bit messed up. Leaving it a tad shorter than it should be I went to order a new one but it's a three month wait Over night I've tidied the end up and but a bit of metal putty on the end now all good until the new one...	ttboof	3	708	Nov 14, 2020 by ttboof
	Rev limits (Preview) I had to reset my Trail Tech speedo recently and have the options to enter some indication points for high rev range during gear changes. I've had a quick search but didn't find anything conclusive. It has the option to flash LED lights to change gears. Has options for High rev range and Danger. Any idea...	Base	4	850	Nov 6, 2020 by TTRfan
	Restoring an airbox intake boot to original shape (Preview) A mate gave me this tip and it seems to have worked! My airbox intake boot is a tight fit and it is sometimes difficult to get it to sit fully on the carb. One remedy might be (a) to find some pipe that is a tight fit in the mouth of the boot, (b) cramp it in tight. (c) pour really hot water over the boot, (d) pull ha...	TTRfan	0	625	Nov 3, 2020 by TTRfan
	splitting the case (Preview) https://www.rockymountainatvmc.com/parts/tusk-crankcase-splitter-p	little_wing	3	947	Nov 3, 2020 by little_wing
	Sprag clutch (Preview) how long do sprag clutches last ,	SussexTony	10	827	Oct 28, 2020 by SussexTony
	Dash indicator bulb replacement (Preview) So how do we repalce them? High beam indicator is dead. Thanks very much!	jaobedoza	6	938	Oct 28, 2020 by ttr steve
	Starter motor (Preview) I’ve just taken my bike apart to do the sprag clutch and i noticed that everting looked ok , except the starter spline looked really bad , so I’ve ordered a new starter motor, so I thought I would look on ttr thred and just noticed that there was no washers ( shins) on idol gear that got to be why sounds so bad !...	SussexTony	2	653	Oct 28, 2020 by SussexTony
	Idle but dies when given gas - Newbie owner- 2006TTR250 (Preview) 2006TTR 250, set for a couple years in friends garage, was given to me. I cleaned carb and changed oil and air filter and put a new battery in it, it would run on idle with the choke pulled out but would die upon giving any amount of throttle. I bought and replace all new jets and still the same issue. it ru...	Looney	5	1034	Oct 26, 2020 by TTRfan
	New pistons (Preview) How my miles , or how long do I need to run my new wiseco piston kit in for?	SussexTony	3	687	Oct 25, 2020 by SussexTony
	2006 ttr250 complete engine rebuild (Preview) hey all, so i have a 2006 ttr250. I live in ontario canada. so 2006 was the last year for the 250 in this part of the world. this bike was the first dirt bike that i rode and started my love for offroad riding. the bike has an estimate of 500-600 hours the motor has never been opened. other then to check the valv...	little_wing	3	715	Oct 24, 2020 by ttr steve
	rear wheel turns starter (Preview) hello all. bike was running ok. then stalled.. battery was dead. would not bump start. pushed bike back to the car. tried booster cables to car battery. i just get relay click when i touch the electric start button. tryied giving 12 volts directly to starter 12volt input. no sound or even sparks. i put t...	little_wing	3	922	Oct 24, 2020 by TTRfan
	Carb Leak (Preview) Wondered why the garage was smelling of juice lately, I think it may be down to this... Slight weep of petrol from this joint I think. New gaskets or carb off to try and tighten the screws in the bottom up?	TbirdX	2	741	Oct 22, 2020 by mossproof
	Check your brake fluid! (Preview) I know that it is a good idea to change brake fluid every few years but hadn't appreciated quite how old fluid can deteriorate over time until I opened a front brake master cylinder/reservoir today. I had already removed quite a bit of coagulated nasty gunk before I thought to take a couple of photos. Yu...	TTRfan	7	852	Oct 11, 2020 by TerryK
	Need some advice... should I just scrap this bike? fix repair scrap (Preview) Hello. I have an old and rather excessively modified non-running TTR250 that I've set aside because of all the issues it kept getting. I'm wondering if it's even worth fixing this thing as I've already sank over $1000 on repairs alone and it still keeps getting issues. This thing has lived in the mecha...	purdoy25	2	832	Oct 7, 2020 by purdoy25
	What is this supposed to look like? (Preview) Seems previous owner used epoxy to stop a leak.	jaobedoza	2	782	Sep 28, 2020 by jaobedoza
	help mounting speedometer (Preview) Hello everyone, just bought a TTR from 2005 but the speedometer was not mounted. Now I try to put it back but it seems not to fit (the holes are not aligned). Can one of you take a picture of the mounting points of the speedometer so I understand how it should me mounted? Thanks in advance for your help! Bori...	boris04300	8	1085	Sep 21, 2020 by boris04300
	Is my sprag clutch going? Or gone? [video with sound] sprag clutch video (Preview) Just recorded a vid of my TTR - just got it last week. Sometimes there's a heavy clunk when I kill the engine, sometimes no clunk, sometimes just a small one. I'm hoping someone with experience of these things can shed some light. Thanks, Paul -- Edited by PaulF...	PaulFoxton	12	778	Sep 19, 2020 by PaulFoxton
	Tyre comparison (Preview) Heidenau K60 in 130/80/18 on the left. Pirelli MT21 in 120/80/18 Michelin Tracker in 100/100/18 on the right. These are the only tyres I've tried so far so the comments are relative to these three tyres in UK conditions. I am searching for a green lane/TET tyre. Heidenau's were comfortable and fun on r...	Coley	7	1647	Sep 18, 2020 by Horizonti
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