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

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...

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

http://www.ttr250.com/Removing_carb/TTR_carb_removal.htm

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...

TT-R250M · TT-R250M

http://ttr250.com/Carb/TTR250_carburettor_strip_and_rebuild_guide.htm

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...

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

TTRfan · TTRfan

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...

Base · Base

Its probably already been mentioned somewhere on here, but after purchasing the All Balls Carby rebuild kit, have to say i was pretty disappointed with it. Hadn't had the carb off since i got it. Theory being if it ain't broke, dont fix it. Was getting some minor over reving when coming to idle, so I th...

mossproof · mossproof

As there are a few 325s about, and the 350 kit is selling, I thought I should begin a thread about carb jetting for the big bore engines. Those of us who have been running the 325 for a while may have noticed they run a bit rich if the jetting is left standard. Sort of the opposite of what you might expect (coun...

TTRfan · TTRfan

I have been in email conversation with Peter Gray of Wilderness Wheels Morocco. They run a small fleet of blue TTRs alongside their KTM 450 EXCs. Peter says they find the TTR to be a totally competent off road bike in Morocco and is his preference over the KTMs for a ride over the mountains. He has rece...

Don · Don

HI I have just rebuilt my carb and fitted a new diaphragm . when i operate the throttle arm there is no jet of fuel coming out. the small jet was blocked. but it seem to be clear now. the diaphragm seems to be pumping ok but no fuel comes out, could it be the check vale, is there any way to test them. any help much...

Sammyboy · Sammyboy

I'm currently rebuilding the carb on my ttr 250 and trying to isolate the revving and idle problem, how do I go about removing the float?

tsherv · tsherv

I have a 2006 TTR 250 that sat for a few years. After it was taken out of storage, the carb was soaked and rebuilt (All balls kit), fuel lines replaced, inline fuel filter replaced, etc. The pilot jet continually plugs up. I've had the carb off countless times (I've actually gotten pretty good at it)....

Forgorin · Forgorin

Like the title says. The bike has power after 80km. I had the carb apart and she was clean. jets look clean too. It was like this when it was purchased used.... Any ideas?

Sammyboy · Sammyboy

Has anyone done a carb swap or is the stock carb good? For context I want to build my ttr for aggressive riding and xc races.

TTRfan · TTRfan

I have had some cold starting problems on my 325 whereby it starts but quickly dies. I raised the pilot jet size up from 48 to 50 and it seemed to make an improvement but I haven't run the TTR often enough to test it thoroughly. I came across this video this morning and, even though the guy is dealing with a TT...

PetahNZ · PetahNZ

Hi, So I am a bit of a mechanical newbie (first post here too). I have a TTR250, but it stopped running. So I decided to try and clean out the carb as the first thing I've ever done to a bike (or even a car). Seemed to go alright, but after putting it all back together it has started leaking petrol out of the brea...

TTRfan · TTRfan

Yeah - I know I should know but my brain isn't working this morning

dlee22 · dlee22

https://www.ebay.ie/itm/Yamaha-TTR250-TT-R-250R-TTR-250-cc-R250-Raid-Carburetor-Carb-Stage-1-3-Jet-Kit-/332032207413

Dave White · Dave White

Bough a 2003 TTR250, whoever tried to service carb before me stripped and pinched off (with pliers) the accelerator pump nozzle jet. You cant buy this part and it doesn't show on the exploded ipc diagram. Anyone have a fix or a carb they don't need?

Dan-in-a-Van · Dan-in-a-Van

I rode the TTR to work today and she ran perfectly. I left her parked in the rain for 8 hours. When I started her up to come home, she just didn't want to run. I managed to limp about 1/4 mile, sometimes running fine, then bogging and stalling. Next only running with the choke full out before stalling again?...

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...

yamaha42 · yamaha42

Hello all. I recently tore down my carb and cleaned it out because it had been sitting for a year and a half. I got it installed and put the bike back together, but when i turn on the pet****, gas comes out of both overflow lines. is it possible that i bent my floats?

NateGuy · NateGuy

Where can i find more detailed info on where everything goes when you're putting the bowl assembly of the carb back together?

NateGuy · NateGuy

My bike, after sitting for almost a year, would not get full power under full throttle First gear wasnt as noticable, but anything beyond that it seemed like it was choking on itself. Almost like a lope on a muscle car. I pulled the carb out, and I have a question about the accelerator pump thingy. Th...

650Katman · 650Katman

I found out why I had no tick over. Check out a previous owners handywork

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...

Topic		Started By	Replies	Views	Last Post
	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	13	27045	4 days ago by CjJoyce
	STICKY: Carburettor - main nozzle differences ( 1 2 ) (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	57	55320	Jun 15, 2020 by dlee22
	STICKY: Carburettor - pictorial guide to stripping and checking a carb (Preview) http://www.ttr250.com/Removing_carb/TTR_carb_removal.htm	TTRfan	21	19009	Mar 3, 2020 by miltos
	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	63	64399	Jul 12, 2019 by FBRConcepts
	STICKY: Rebuilding a TTR250 Teikei Y30P Carburettor (Preview) http://ttr250.com/Carb/TTR250_carburettor_strip_and_rebuild_guide.htm	TT-R250M	40	34833	Jan 17, 2019 by scam
	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	3257	Feb 10, 2018 by katana
	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	2527	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	90822	Apr 18, 2017 by TTRfan
	STICKY: Carburettor removal and replacement (Preview) 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	2144	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	29970	Jan 11, 2013 by goodman
	All Balls Carby repair kit (Preview) Its probably already been mentioned somewhere on here, but after purchasing the All Balls Carby rebuild kit, have to say i was pretty disappointed with it. Hadn't had the carb off since i got it. Theory being if it ain't broke, dont fix it. Was getting some minor over reving when coming to idle, so I th...	Base	9	509	12 days ago by CjJoyce
	The Big Bore Carb Jetting Thread - 325 and 350cc (Preview) As there are a few 325s about, and the 350 kit is selling, I thought I should begin a thread about carb jetting for the big bore engines. Those of us who have been running the 325 for a while may have noticed they run a bit rich if the jetting is left standard. Sort of the opposite of what you might expect (coun...	mossproof	35	1165	December 7th by 325 ttr
	Fitting a Mikuni TM32 and a TM33 ( 1 2 ) (Preview) I have been in email conversation with Peter Gray of Wilderness Wheels Morocco. They run a small fleet of blue TTRs alongside their KTM 450 EXCs. Peter says they find the TTR to be a totally competent off road bike in Morocco and is his preference over the KTMs for a ride over the mountains. He has rece...	TTRfan	68	28981	October 29th by TTRfan
	Carb Problem (Preview) HI I have just rebuilt my carb and fitted a new diaphragm . when i operate the throttle arm there is no jet of fuel coming out. the small jet was blocked. but it seem to be clear now. the diaphragm seems to be pumping ok but no fuel comes out, could it be the check vale, is there any way to test them. any help much...	Don	3	210	Jul 5, 2020 by ttr steve
	Removing the float (Preview) I'm currently rebuilding the carb on my ttr 250 and trying to isolate the revving and idle problem, how do I go about removing the float?	Sammyboy	1	145	Jul 4, 2020 by ttr steve
	Recurring pilot jet plugged (Preview) I have a 2006 TTR 250 that sat for a few years. After it was taken out of storage, the carb was soaked and rebuilt (All balls kit), fuel lines replaced, inline fuel filter replaced, etc. The pilot jet continually plugs up. I've had the carb off countless times (I've actually gotten pretty good at it)....	tsherv	2	241	May 18, 2020 by PlumasDude
	no power over 80km/h (Preview) Like the title says. The bike has power after 80km. I had the carb apart and she was clean. jets look clean too. It was like this when it was purchased used.... Any ideas?	Forgorin	12	438	Apr 1, 2020 by Forgorin
	Carb swap? (Preview) Has anyone done a carb swap or is the stock carb good? For context I want to build my ttr for aggressive riding and xc races.	Sammyboy	1	266	Mar 30, 2020 by TTRfan
	Cold starting problem (Preview) I have had some cold starting problems on my 325 whereby it starts but quickly dies. I raised the pilot jet size up from 48 to 50 and it seemed to make an improvement but I haven't run the TTR often enough to test it thoroughly. I came across this video this morning and, even though the guy is dealing with a TT...	TTRfan	3	387	Feb 22, 2020 by TTRfan
	Petrol leak (Preview) Hi, So I am a bit of a mechanical newbie (first post here too). I have a TTR250, but it stopped running. So I decided to try and clean out the carb as the first thing I've ever done to a bike (or even a car). Seemed to go alright, but after putting it all back together it has started leaking petrol out of the brea...	PetahNZ	11	381	Feb 5, 2020 by Jeff B
	Sanity check! Does screwing out the pilot screw richen or lean the mixture please?? (Preview) Yeah - I know I should know but my brain isn't working this morning	TTRfan	14	660	Feb 1, 2020 by TTRfan
	Has anyone tried a jetting kit? (Preview) https://www.ebay.ie/itm/Yamaha-TTR250-TT-R-250R-TTR-250-cc-R250-Raid-Carburetor-Carb-Stage-1-3-Jet-Kit-/332032207413	dlee22	19	592	Jan 22, 2020 by Spyrious
	Accelerator pump nozzle (Preview) Bough a 2003 TTR250, whoever tried to service carb before me stripped and pinched off (with pliers) the accelerator pump nozzle jet. You cant buy this part and it doesn't show on the exploded ipc diagram. Anyone have a fix or a carb they don't need?	Dave White	6	455	Jan 20, 2020 by Dave White
	Rain stops play? (Preview) I rode the TTR to work today and she ran perfectly. I left her parked in the rain for 8 hours. When I started her up to come home, she just didn't want to run. I managed to limp about 1/4 mile, sometimes running fine, then bogging and stalling. Next only running with the choke full out before stalling again?...	Dan-in-a-Van	5	348	Jan 17, 2020 by Dan-in-a-Van
	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	27	3106	Dec 31, 2019 by ttboof
	Carb issues ( 1 2 3 ) (Preview) Hello all. I recently tore down my carb and cleaned it out because it had been sitting for a year and a half. I got it installed and put the bike back together, but when i turn on the pet****, gas comes out of both overflow lines. is it possible that i bent my floats?	yamaha42	148	87152	Nov 27, 2019 by Blacknight
	More detail on rebuilding the carb? (Preview) Where can i find more detailed info on where everything goes when you're putting the bowl assembly of the carb back together?	NateGuy	6	745	Nov 23, 2019 by NateGuy
	99 250 (Preview) My bike, after sitting for almost a year, would not get full power under full throttle First gear wasnt as noticable, but anything beyond that it seemed like it was choking on itself. Almost like a lope on a muscle car. I pulled the carb out, and I have a question about the accelerator pump thingy. Th...	NateGuy	4	419	Nov 2, 2019 by TTRfan
	No idle. Pop and stop (Preview) I found out why I had no tick over. Check out a previous owners handywork	650Katman	5	562	Jul 25, 2019 by ttr steve
	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	3	721	Jul 21, 2019 by mossproof
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