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

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

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

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...

oshanrube · oshanrube

I'm not much of a mechanic but I can replace stuff, about 2 years ago I took this apart to restore and it kinda got stalled, and now I got a rebuilt kit and changed all the parts in the carb. But it's still running very rough,it smooths out for a sec but stalls right...

DelBoy · DelBoy

I've just completed a carb rebuild (with All Balls kit) but now have a leak from the diaphragm cover. I'm trying to avoid the expense of a new diaphragm so wondered if it also acts as a gasket, sealing against the cover? If it doesn't act as a gasket, then I assume replacing it isn't going to help. I've atta...

Booki · Booki

I will try and keep this a bit short... Bike: 2005 TTR250 - Aussie spec. Was doing some general cleaning on my Original carb that had done bugger all work from new (700km's) (it had a blocked pilot jet), ended up breaking the float tower off, had sourced a used carb. I believe this used carb is the 'older' s...

TTRtramp · TTRtramp

Ok guys, I have tried to avoid asking this question as the answer should be obvious, but despite a thorough search of the forum, I cannot find the specific answer although the general problem is referred to a lot. How does one actually remove the float bowl check valve seat and needle from the carby whe...

GzC59 · GzC59

Hi Folks, looks like my bike has developed a misfire on part throttle, the first part. Starts OK, always has and I’ve not had this before. I usually turn the fuel off and let the float bowl empty after a ride as the bike can stand for a while not being used. Not good, I know ! I had a look at the float bowl drain s...

wobbly · wobbly

Not exactly carb But what fuel are people using, is E10 OK in the long run.

650Katman · 650Katman

Hi, I ordered an all balls carb kit and a diaphragm for the accelerator pump from the marvellous Totally TTR's. My carb was dripping because some idiot( me ) put BP ultimate in it because the garage had just changed to E10 , So the rub is it was ultimate diesel So I stripped carb and replaced parts except f...

Bluebandit2g · Bluebandit2g

Need some help. Just got this bike on a trade. 03. Rebuilt the carb using all new parts with STOCK jetting sizes. Bike runs bad lean no matter what I do. Even with the airbox off. Black plug. Sooty pipe. Black smoke. I'm not a carb newb. Pulled it back off three times now to check things ...

BigGreener · BigGreener

New to me 2003 TTR250, the carb slide is sticking half way open periodically. After some reading I understand the coating on the side starts to fail, which is the likely cause of this? Does anyone know if I can just buy a new slide? If so, from where and what is the part number? Thanks, Ryan

TTRfan · TTRfan

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

The TTR Kid · The TTR Kid

Hello I am have a few problems with my TTR250. She's just reving high and because I haven't seen this carb before I'm confused.. basically when I got the bike running she was running high on revs and I couldn't found out how to adjust it to a nice pop pop pop. It's just reving above normal and getting hot qui...

Athenaacapella · Athenaacapella

Hi so I need help I bought this TTR 250 from my brother and the carb is shot. Does anyone know where I can purchase a new one? I have searched every where and I am not willing to pay $400 for a new one. Any help is appreciated.

Bob1973 · Bob1973

Hello could someone tell me what this little dial is at the bottom of my carb. It's on a thread and screws in and out. Located bottom left of carb in the photo. Thank you!

jball78 · jball78

Just purchased a 2004. Prev owner said bike has sat since 8/16. The bike will not start. After looking at the carb, one of the hoses is not connected. The hose on the left hand side is connected and the drain hose is also. However on the right side of the carbs hose is no where to be found. Any chance that is my...

Gooki · Gooki

Hi folks, bike runs perfect, but when it comes to idle, engine stops. Is ist the little wheel in front of the carb? Can i take it out and clean? Where is the idle jet? thanks!

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?

Topic		Started By	Replies	Views	Last Post
	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	64	66673	April 19th by Booki
	STICKY: Rebuilding a TTR250 Teikei Y30P Carburettor (Preview) http://ttr250.com/Carb/TTR250_carburettor_strip_and_rebuild_guide.htm	TT-R250M	43	39743	April 3rd by charrito
	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	29236	Jan 21, 2021 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	58194	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	20266	Mar 3, 2020 by miltos
	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	4008	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	3198	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	95749	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	2502	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	32070	Jan 11, 2013 by goodman
	Bike stalling and running rough (Preview) I'm not much of a mechanic but I can replace stuff, about 2 years ago I took this apart to restore and it kinda got stalled, and now I got a rebuilt kit and changed all the parts in the carb. But it's still running very rough,it smooths out for a sec but stalls right...	oshanrube	5	184	May 29th by texasT
	Leaky diaphragm cover (Preview) I've just completed a carb rebuild (with All Balls kit) but now have a leak from the diaphragm cover. I'm trying to avoid the expense of a new diaphragm so wondered if it also acts as a gasket, sealing against the cover? If it doesn't act as a gasket, then I assume replacing it isn't going to help. I've atta...	DelBoy	5	132	May 26th by TTRtramp
	Choke not working correctly and bike stalling out after throttle (Preview) I will try and keep this a bit short... Bike: 2005 TTR250 - Aussie spec. Was doing some general cleaning on my Original carb that had done bugger all work from new (700km's) (it had a blocked pilot jet), ended up breaking the float tower off, had sourced a used carb. I believe this used carb is the 'older' s...	Booki	1	227	April 28th by ttr steve
	Float bowl check valve (Preview) Ok guys, I have tried to avoid asking this question as the answer should be obvious, but despite a thorough search of the forum, I cannot find the specific answer although the general problem is referred to a lot. How does one actually remove the float bowl check valve seat and needle from the carby whe...	TTRtramp	10	487	April 5th by TTRtramp
	Part Throttle Misfire (Preview) Hi Folks, looks like my bike has developed a misfire on part throttle, the first part. Starts OK, always has and I’ve not had this before. I usually turn the fuel off and let the float bowl empty after a ride as the bike can stand for a while not being used. Not good, I know ! I had a look at the float bowl drain s...	GzC59	13	456	January 12th by GzC59
	Fuel (Preview) Not exactly carb But what fuel are people using, is E10 OK in the long run.	wobbly	7	316	Nov 29, 2021 by KiwiJeff
	150 main jet (Preview) Hi, I ordered an all balls carb kit and a diaphragm for the accelerator pump from the marvellous Totally TTR's. My carb was dripping because some idiot( me ) put BP ultimate in it because the garage had just changed to E10 , So the rub is it was ultimate diesel So I stripped carb and replaced parts except f...	650Katman	1	264	Oct 11, 2021 by mossproof
	Running rich no matter what. Stock jetting help please. Stumped (Preview) Need some help. Just got this bike on a trade. 03. Rebuilt the carb using all new parts with STOCK jetting sizes. Bike runs bad lean no matter what I do. Even with the airbox off. Black plug. Sooty pipe. Black smoke. I'm not a carb newb. Pulled it back off three times now to check things ...	Bluebandit2g	19	498	Aug 10, 2021 by Jeff B
	Where to buy carb slide? (Preview) New to me 2003 TTR250, the carb slide is sticking half way open periodically. After some reading I understand the coating on the side starts to fail, which is the likely cause of this? Does anyone know if I can just buy a new slide? If so, from where and what is the part number? Thanks, Ryan	BigGreener	2	242	Aug 1, 2021 by BigGreener
	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	15	1268	Jul 27, 2021 by Jeff B
	carb ???? (Preview) Hello I am have a few problems with my TTR250. She's just reving high and because I haven't seen this carb before I'm confused.. basically when I got the bike running she was running high on revs and I couldn't found out how to adjust it to a nice pop pop pop. It's just reving above normal and getting hot qui...	The TTR Kid	6	324	May 29, 2021 by ttboof
	Where can I find a new 2005 carburetor? (Preview) Hi so I need help I bought this TTR 250 from my brother and the carb is shot. Does anyone know where I can purchase a new one? I have searched every where and I am not willing to pay $400 for a new one. Any help is appreciated.	Athenaacapella	5	470	May 24, 2021 by Jeff B
	hello what is this screw (Preview) Hello could someone tell me what this little dial is at the bottom of my carb. It's on a thread and screws in and out. Located bottom left of carb in the photo. Thank you!	Bob1973	1	315	May 15, 2021 by TTRfan
	Carb drain/breather hose routing (Preview) Just purchased a 2004. Prev owner said bike has sat since 8/16. The bike will not start. After looking at the carb, one of the hoses is not connected. The hose on the left hand side is connected and the drain hose is also. However on the right side of the carbs hose is no where to be found. Any chance that is my...	jball78	12	3987	Apr 11, 2021 by TTRfan
	No Idle (Preview) Hi folks, bike runs perfect, but when it comes to idle, engine stops. Is ist the little wheel in front of the carb? Can i take it out and clean? Where is the idle jet? thanks!	Gooki	1	278	Mar 3, 2021 by TTRfan
	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	1019	Jan 14, 2021 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	33	1753	Dec 7, 2020 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	31858	Oct 29, 2020 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	486	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	536	Jul 4, 2020 by ttr steve
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