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

TT-R250M · TT-R250M

NB UPDATED VERSION WITH ALL THE PHOTOS HERE - http://ttr250.com/Carb/TTR250_carburettor_strip_and_rebuild_guide.htm First of all, I would like to warn you that this is a MASSIVE thread and it will take some reading. By the end of it, you should have learned all there is to know about rebuildin...

petenz · petenz

had enough of the TTR carb leaking fuel... Time to put the 32mm flat slide on... the carb is 12mm shorter the the TTR carb so will make a 12mm thick block to go between the head & manifold that will move the carb/manifold back 12mm to get the inlet into the air boot... put a 42 pilot & 50 main jet in it...

TTRfan · TTRfan

After breaking a couple of shafts (they are only made of brass) in the past trying to free a seized choke I decided to try a different approach today and it worked so I thought I would share it. I firstly took the top off the carb to see if there was any way of freeing it from inside but I don't believe there is...

barra8 · barra8

Since it seems to be a common problem to break the float pin support mount on the TTR carburetors i thought i would add this simple fix to the problem.Thanks for reading, Cheers. The hole into the float pin support mount must be drilled on a slight angle so it does'nt hit the needle seat mount (pictured...

TTRfan · TTRfan

I have tried my hand (Trish's actually!) at doing a couple of video tutorials to help owners removing and replacing their carb for the first time. I didn't really prepare properly so there is quite a bit of mumbling and senior "stuck for the words" moments so sorry about that! Here they are. In the first...

nwrider · nwrider

i am putting on new exhaust and with out taking out the carb to check if the pilot jet i need is a 52.5 is it long or short, and the 140 main i have seen in other post is small round. can someone help. its for a 2006 us 250. thanks

pantheman · pantheman

Hi to all . I have a 93 Japan grey import in Greece (yes we are still alive and kickin) and I looking to restore my carb. I have found this page for anyone who is intersted. My problem is that they list models from 1999 to 2006. For all the parts they show total compatibility to all years models, EXCEPT the mai...

TTRfan · TTRfan

See http://www.ttr250.com/Removing_carb/TTR_carb_removal.htm Also, there are a couple of tutorial videos showing removal and replacement of the carb here https://youtu.be/0k1EG1LuPBc and here https://youtu.be/Nlhl9aD9wHI

TTRfan · TTRfan

The forum seems to replicate owners problems on my own bikes somehow This time the problem was a rounded out drain screw on a carb. I drilled out the damaged screw with a 3mm drill and then extracted it with a 3.5mm extractor. The new drain screw is part number 14T-14104-00 - available here Job done! B...

TTRfan · TTRfan

There is advice on taking out the carb here http://www.ttr250.com/Removing_carb/TTR_carb_removal.htm Also, there are a couple of tutorial videos showing removal and replacement of the carb here https://youtu.be/0k1EG1LuPBc and here https://youtu.be/Nlhl9aD9wHI Totally TTRs sell a su...

tom13 · tom13

Google translator. I think it's a carburetor. After being tipped to the left (I have not topped the right one yet) I can not run the foot of the engine. I do not have an electric starter. It is only after about 15-20 minutes that the motor can be started. Such a mystery. What is going on? Thank you.

mmwain · mmwain

Can't find this one anywhere in the 5 pages of carb posts so here goes... Bike has a very intermittent fault, will run perfectly for a long time then suddenly stops completely or misfires on mid/high throttle. The problem started after stripping the bike for frame paint and valve guide seals, but did...

mossproof · mossproof

Rebuilding a recently purchased used carb that was in quite a state and in checking the float bowl check valve (little top hat shaped brass thingy that seats into the bowl) found I couldn't blow air through it either way. Much soaking and prodding with a stick, then blowing the air line through it, and i...

DECYPHERX · DECYPHERX

So i just bought myself a 1999 ttr250 and everything works amazing, however the idle is high. I can fix this by giving it throttle real quick and letting off and then the idle goes down to normal. The cable doesnt seem to be sticking. Not entirely sure whats going on here. Theres a post on this forum that de...

ttrtim · ttrtim

Hi, Hopefully there's someone out there who's TTR'd the Pyrenees! Myself and a mate are going in a months time, both ride standard TTR250's, so the question is, will we need to re-jet? Going to be 10,000 feet max. Appreciate any help/light anyone can shed please. cheers, Tim

Forgorin · Forgorin

So, I put on a new muffler over the weekend and took the bike for a spin. Wow! More grunt! I feel like she has more torque now (able to change gears earlier at lower speeds). I am hearing a bit of backfire when decelerating at higher RPMs. I am unsure if this is because it is running lean or rich (haven't...

FFBeefcake · FFBeefcake

I recently inherited a 2004 ttr250 from a fellow firefighter who passed away. The bike was given to me without a carb. It is a project bike with intention of eventually making it street legal as a tribute bike to continue my buddies plan. I've looked to buy the teikei y30p but am unable to find one online....

tom13 · tom13

Google translator. Hello. I installed a new original carburettor and kickstarter does not start. Is it possible in the new carburettor that the fuel level is bad?

Benjah · Benjah

Anyone know where to get hold of one of these? Haven't had much luck with Mr Google. Cheers

z1g · z1g

Hi Guys, I thought i had my idle screw set right. When cold, fires up straight away, ocasonially use choke for a couple seconds. Idles fine, sounds fine not revving hard. Noticed tonight when i went for a ride, that coming into intersections/round abouts. Anytime i pulled the clutch in it seemed to be o...

mossproof · mossproof

Found this article whilst pondering carb options for the 350 (sorry guys, still twiddling my thumbs waiting for Woessner to get their act together...) Contains a post from a certain TTRFAN. That you Brian? Does anyone have any further info? Think this TM33 pumper carb can be used on the DR350, whi...

Rydasc6102 · Rydasc6102

dumb question but is the choke suposed to significantly raise the RPMs?

OkieRider · OkieRider

Hey all. New to the forum. I posted this over on Thumper Talk, and got no response, so I decided to make an account here. Its a 2005 US model. I got the bike last year. I did the basic stuff, took the baffle out of the pipe, rejetted, took the snorkel off of airbox, etc. That's when my problems started... ...

Rydasc6102 · Rydasc6102

I have three questions about my carb 1. Should it leak gas if the bike is on its side? 2. Should it stay running when it's on it's side? 3. When I do a coldstart should the bike cut out whenever I blip the throttle thanks.

Ether · Ether

I've taken apart my carb to deal with some leakage and it has clearly been taken apart before. One of the float arms had been broken off and pinned back together. There is also no white plastic insert seen in the following pic. What purpose does the white plastic bit have and does it matter if it doesn't ha...

TTRfan · TTRfan

Ever wondered what the little black bottle plumbed into the TTR's air intake was supposed to do? I confess to having been ignorant until reading a review of the new Beta enduro bikes in the latest TBM magazine when the YEIS was mentioned. I did a search on t'internet and found some more information.Ap...

z1g · z1g

HI all, Chasing up a fuel leak. Have not had time to pull bits and pieces off the bike.... but. I have decided to run inline fuel filter *crazy kid* Put a brand new one (filter) on tonight, and noticed that even when fuel tap(peac o c k) was in the off position, fuel was coming out. I would not say, full flow, b...

ttr steve · ttr steve

As I am always asking Bri to test kits that I have in the shop, thought I would have a go at fitting the all balls carb kit, as my carb needed a overhaul on my OE that I am going to do a full rebuild/ 350 kit on. So I started off stripping the carb down Now I think most people buy the kits, just to use all the gaskets O...

Ether · Ether

My carb has a leak from the diaphram area at the bottom of the carb so the diaphram is probably toast, I'll need to replace it. My question is will this issue have an effect on performance? I have no other TTR to compare mine to but if I had to guess I would say it's feeling underpowered.

TTRfan · TTRfan

I have a carb that runs rich on tickover. Just touch the choke and its stalls immediately. I have set the float height artificially low - made no difference so it's not flooding. I have checked that the choke is seating properly so that's not the issue. I tried a smaller pilot jet and it made no difference...

Topic		Started By	Replies	Views	Last Post
	STICKY: Rebuilding a TTR250 Teikei Y30P Carburettor (Preview) NB UPDATED VERSION WITH ALL THE PHOTOS HERE - http://ttr250.com/Carb/TTR250_carburettor_strip_and_rebuild_guide.htm First of all, I would like to warn you that this is a MASSIVE thread and it will take some reading. By the end of it, you should have learned all there is to know about rebuildin...	TT-R250M	39	23432	July 23rd by mossproof
	STICKY: Alternative carbs for the TTR250 - 32mm carb ( 1 2 ) (Preview) had enough of the TTR carb leaking fuel... Time to put the 32mm flat slide on... the carb is 12mm shorter the the TTR carb so will make a 12mm thick block to go between the head & manifold that will move the carb/manifold back 12mm to get the inlet into the air boot... put a 42 pilot & 50 main jet in it...	petenz	61	3667	April 23rd by sledman 1
	STICKY: Freeing off a jammed choke (Preview) After breaking a couple of shafts (they are only made of brass) in the past trying to free a seized choke I decided to try a different approach today and it worked so I thought I would share it. I firstly took the top off the carb to see if there was any way of freeing it from inside but I don't believe there is...	TTRfan	6	1596	Feb 10, 2018 by katana
	STICKY: Carburettor - repairing a broken carburetor - float pin post and choke (Preview) Since it seems to be a common problem to break the float pin support mount on the TTR carburetors i thought i would add this simple fix to the problem.Thanks for reading, Cheers. The hole into the float pin support mount must be drilled on a slight angle so it does'nt hit the needle seat mount (pictured...	barra8	9	20320	Oct 25, 2017 by sledman 1
	STICKY: Removing and replacing the TTR250 carb video tutorials (Preview) I have tried my hand (Trish's actually!) at doing a couple of video tutorials to help owners removing and replacing their carb for the first time. I didn't really prepare properly so there is quite a bit of mumbling and senior "stuck for the words" moments so sorry about that! Here they are. In the first...	TTRfan	8	461	Aug 8, 2017 by leigh
	STICKY: Carb - jetting information (Preview) i am putting on new exhaust and with out taking out the carb to check if the pilot jet i need is a 52.5 is it long or short, and the 140 main i have seen in other post is small round. can someone help. its for a 2006 us 250. thanks	nwrider	44	40848	Apr 18, 2017 by TTRfan
	STICKY: Carburettor - main nozzle differences (Preview) Hi to all . I have a 93 Japan grey import in Greece (yes we are still alive and kickin) and I looking to restore my carb. I have found this page for anyone who is intersted. My problem is that they list models from 1999 to 2006. For all the parts they show total compatibility to all years models, EXCEPT the mai...	pantheman	48	24018	Nov 5, 2014 by TTRfan
	STICKY: Carburettor removal and replacement (Preview) See http://www.ttr250.com/Removing_carb/TTR_carb_removal.htm Also, there are a couple of tutorial videos showing removal and replacement of the carb here https://youtu.be/0k1EG1LuPBc and here https://youtu.be/Nlhl9aD9wHI	TTRfan	0	1470	Nov 13, 2013 by TTRfan
	STICKY: Carburettor - replacing a damaged carb drain screw (Preview) The forum seems to replicate owners problems on my own bikes somehow This time the problem was a rounded out drain screw on a carb. I drilled out the damaged screw with a 3mm drill and then extracted it with a 3.5mm extractor. The new drain screw is part number 14T-14104-00 - available here Job done! B...	TTRfan	15	20111	Jan 11, 2013 by goodman
	STICKY: Carburettor - pictorial guide to stripping and checking a carb (Preview) There is advice on taking out the carb here http://www.ttr250.com/Removing_carb/TTR_carb_removal.htm Also, there are a couple of tutorial videos showing removal and replacement of the carb here https://youtu.be/0k1EG1LuPBc and here https://youtu.be/Nlhl9aD9wHI Totally TTRs sell a su...	TTRfan	0	13338	Feb 4, 2012 by TTRfan
	Do not start after tipover (Preview) Google translator. I think it's a carburetor. After being tipped to the left (I have not topped the right one yet) I can not run the foot of the engine. I do not have an electric starter. It is only after about 15-20 minutes that the motor can be started. Such a mystery. What is going on? Thank you.	tom13	6	133	October 1st by ttboof
	Engine stops on hard accelleration (Preview) Can't find this one anywhere in the 5 pages of carb posts so here goes... Bike has a very intermittent fault, will run perfectly for a long time then suddenly stops completely or misfires on mid/high throttle. The problem started after stripping the bike for frame paint and valve guide seals, but did...	mmwain	9	220	September 24th by ttboof
	Float bowl check valve (Preview) Rebuilding a recently purchased used carb that was in quite a state and in checking the float bowl check valve (little top hat shaped brass thingy that seats into the bowl) found I couldn't blow air through it either way. Much soaking and prodding with a stick, then blowing the air line through it, and i...	mossproof	0	52	September 8th by mossproof
	Throttle sticking HELP (Preview) So i just bought myself a 1999 ttr250 and everything works amazing, however the idle is high. I can fix this by giving it throttle real quick and letting off and then the idle goes down to normal. The cable doesnt seem to be sticking. Not entirely sure whats going on here. Theres a post on this forum that de...	DECYPHERX	24	1358	September 3rd by ttr steve
	Do I need to re-jet for Pyrenees? Anyone been?! (Preview) Hi, Hopefully there's someone out there who's TTR'd the Pyrenees! Myself and a mate are going in a months time, both ride standard TTR250's, so the question is, will we need to re-jet? Going to be 10,000 feet max. Appreciate any help/light anyone can shed please. cheers, Tim	ttrtim	12	702	August 20th by dlee22
	New muffler does carb need adjusting? (Preview) So, I put on a new muffler over the weekend and took the bike for a spin. Wow! More grunt! I feel like she has more torque now (able to change gears earlier at lower speeds). I am hearing a bit of backfire when decelerating at higher RPMs. I am unsure if this is because it is running lean or rich (haven't...	Forgorin	12	384	August 6th by Forgorin
	Bike without a carb Carburetor (Preview) I recently inherited a 2004 ttr250 from a fellow firefighter who passed away. The bike was given to me without a carb. It is a project bike with intention of eventually making it street legal as a tribute bike to continue my buddies plan. I've looked to buy the teikei y30p but am unable to find one online....	FFBeefcake	1	153	July 8th by mossproof
	Strange fuel level (Preview) Google translator. Hello. I installed a new original carburettor and kickstarter does not start. Is it possible in the new carburettor that the fuel level is bad?	tom13	5	211	June 29th by tom13
	Source for #52 pilot Jet (Preview) Anyone know where to get hold of one of these? Haven't had much luck with Mr Google. Cheers	Benjah	1	113	June 28th by z1g
	High Idle when RIDING. (Preview) Hi Guys, I thought i had my idle screw set right. When cold, fires up straight away, ocasonially use choke for a couple seconds. Idles fine, sounds fine not revving hard. Noticed tonight when i went for a ride, that coming into intersections/round abouts. Anytime i pulled the clutch in it seemed to be o...	z1g	38	792	June 12th by z1g
	Mikuni pumper carbs (Preview) Found this article whilst pondering carb options for the 350 (sorry guys, still twiddling my thumbs waiting for Woessner to get their act together...) Contains a post from a certain TTRFAN. That you Brian? Does anyone have any further info? Think this TM33 pumper carb can be used on the DR350, whi...	mossproof	10	493	June 4th by leigh
	Choke raises idle (Preview) dumb question but is the choke suposed to significantly raise the RPMs?	Rydasc6102	2	133	May 22nd by ttboof
	High or sticking idle?? (Preview) Hey all. New to the forum. I posted this over on Thumper Talk, and got no response, so I decided to make an account here. Its a 2005 US model. I got the bike last year. I did the basic stuff, took the baffle out of the pipe, rejetted, took the snorkel off of airbox, etc. That's when my problems started... ...	OkieRider	46	1675	May 22nd by z1g
	Carb questions (Preview) I have three questions about my carb 1. Should it leak gas if the bike is on its side? 2. Should it stay running when it's on it's side? 3. When I do a coldstart should the bike cut out whenever I blip the throttle thanks.	Rydasc6102	7	203	May 13th by Rydasc6102
	Is my carb missing bits? (Preview) I've taken apart my carb to deal with some leakage and it has clearly been taken apart before. One of the float arms had been broken off and pinned back together. There is also no white plastic insert seen in the following pic. What purpose does the white plastic bit have and does it matter if it doesn't ha...	Ether	6	167	May 7th by TTRfan
	Yamaha Energy Induction System (YEIS) - boost bottle, air chamber, resonator (Preview) Ever wondered what the little black bottle plumbed into the TTR's air intake was supposed to do? I confess to having been ignorant until reading a review of the new Beta enduro bikes in the latest TBM magazine when the YEIS was mentioned. I did a search on t'internet and found some more information.Ap...	TTRfan	13	7054	May 4th by TTRfan
	When fuel is switched to the off position. NO fuel should leak right? (Preview) HI all, Chasing up a fuel leak. Have not had time to pull bits and pieces off the bike.... but. I have decided to run inline fuel filter crazy kid Put a brand new one (filter) on tonight, and noticed that even when fuel tap(peac o c k) was in the off position, fuel was coming out. I would not say, full flow, b...	z1g	3	160	May 3rd by z1g
	All balls Carb Rebuild (Preview) As I am always asking Bri to test kits that I have in the shop, thought I would have a go at fitting the all balls carb kit, as my carb needed a overhaul on my OE that I am going to do a full rebuild/ 350 kit on. So I started off stripping the carb down Now I think most people buy the kits, just to use all the gaskets O...	ttr steve	14	303	April 30th by ttr steve
	Will a carb leak impact performance? (Preview) My carb has a leak from the diaphram area at the bottom of the carb so the diaphram is probably toast, I'll need to replace it. My question is will this issue have an effect on performance? I have no other TTR to compare mine to but if I had to guess I would say it's feeling underpowered.	Ether	4	151	April 30th by Ether
	TTR running rich on tickover (Preview) I have a carb that runs rich on tickover. Just touch the choke and its stalls immediately. I have set the float height artificially low - made no difference so it's not flooding. I have checked that the choke is seating properly so that's not the issue. I tried a smaller pilot jet and it made no difference...	TTRfan	4	254	Apr 10, 2018 by TTRfan
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