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

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

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

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

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

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... ...

Nic_B · Nic_B

Hi All, first post and being this forum has been a great help in information i am hoping someone can help me out. I have scored a 2005 TTR that by the looks has not been started for over 10 years, and i have had some interesting challenges getting the bike up and running. Carb was totally full and blocked wit...

Lazza · Lazza

Hi, recently bought a 1998 TTR 250, been stood around for a few years. Its developed a carb issue very quickly which is driving me mad, so hoping someone can help! A little diagnostic history...... After getting her home she started up first time and runs really sweet. So after checking her over I took h...

rogpreston · rogpreston

Hi I am talking about an 04 blue tank model bike that I have had for 12yrs so it is not new to me. I am reasonably ok with practical stuff rebuilt engines etc . So my problem started when I came to take thebike out after a longish 1yr year of no activity. Starts up fine ticks over fine will rev up if throttle is op...

Mt6708 · Mt6708

I am a new member who recently purchased a 2006 TT250R. I also purchased a new GYTR exhaust thinking (and K&N filter) it would just be a simple slip on no tuning process (same as my KLR with my Yoshimura & K&N). Unfortunately, I have found out that the exhaust is super loud and also snap, crac...

Riverside · Riverside

Has anyone come across a non-floating cab float...??? Finished a carb rebuild a few months ago, put it all back together and fired it up without a problem. Just come to check it over pre MoT and running (just) pants and carb flooding. Stripped out the carb again, checked float needle for debris but all c...

bbarfield · bbarfield

Hey Everyone, I know there is a ton of info (and confusion) about jetting, size variances between manufacturers, and what part numbers are available in OEM. I've been emailing back and forth with Jetsrus.com, and let them know the Mikuni jets they show on their website as appropriate for the TTR are a...

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!

Topic		Started By	Replies	Views	Last Post
	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	16	34345	August 24th by TTRfan
	STICKY: Carburettor - pictorial guide to stripping and checking a carb (Preview) http://www.ttr250.com/Removing_carb/TTR_carb_removal.htm	TTRfan	22	22064	Feb 16, 2023 by TTRfan
	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	69779	Apr 19, 2022 by Booki
	STICKY: Rebuilding a TTR250 Teikei Y30P Carburettor (Preview) http://ttr250.com/Carb/TTR250_carburettor_strip_and_rebuild_guide.htm	TT-R250M	43	42586	Apr 3, 2022 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	31621	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	67152	Jun 15, 2020 by dlee22
	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	4582	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	4317	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	104316	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	2862	Nov 13, 2013 by TTRfan
	High or sticking idle?? ( 1 2 ) (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	56	5191	May 31st by mossproof
	Accelerator Pump Nozzle alignment (Preview) Hi All, first post and being this forum has been a great help in information i am hoping someone can help me out. I have scored a 2005 TTR that by the looks has not been started for over 10 years, and i have had some interesting challenges getting the bike up and running. Carb was totally full and blocked wit...	Nic_B	1	164	May 23rd by mossproof
	Carb driving me mad!! (Preview) Hi, recently bought a 1998 TTR 250, been stood around for a few years. Its developed a carb issue very quickly which is driving me mad, so hoping someone can help! A little diagnostic history...... After getting her home she started up first time and runs really sweet. So after checking her over I took h...	Lazza	4	312	Jan 29, 2023 by Lazza
	Carb Problems (Preview) Hi I am talking about an 04 blue tank model bike that I have had for 12yrs so it is not new to me. I am reasonably ok with practical stuff rebuilt engines etc . So my problem started when I came to take thebike out after a longish 1yr year of no activity. Starts up fine ticks over fine will rev up if throttle is op...	rogpreston	11	480	Jan 25, 2023 by Lazza
	Carb Air Screw (Preview) I am a new member who recently purchased a 2006 TT250R. I also purchased a new GYTR exhaust thinking (and K&N filter) it would just be a simple slip on no tuning process (same as my KLR with my Yoshimura & K&N). Unfortunately, I have found out that the exhaust is super loud and also snap, crac...	Mt6708	6	473	Jan 21, 2023 by Cubber
	Carb float problem (Preview) Has anyone come across a non-floating cab float...??? Finished a carb rebuild a few months ago, put it all back together and fired it up without a problem. Just come to check it over pre MoT and running (just) pants and carb flooding. Stripped out the carb again, checked float needle for debris but all c...	Riverside	2	291	Nov 5, 2022 by TTRtramp
	Great Update Regarding Jets (Preview) Hey Everyone, I know there is a ton of info (and confusion) about jetting, size variances between manufacturers, and what part numbers are available in OEM. I've been emailing back and forth with Jetsrus.com, and let them know the Mikuni jets they show on their website as appropriate for the TTR are a...	bbarfield	3	1044	Jul 9, 2022 by ttr steve
	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	623	May 29, 2022 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	451	May 26, 2022 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	626	Apr 28, 2022 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	836	Apr 5, 2022 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	903	Jan 12, 2022 by GzC59
	Fuel (Preview) Not exactly carb But what fuel are people using, is E10 OK in the long run.	wobbly	7	640	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	541	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	933	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	509	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	2123	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	611	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	819	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	636	May 15, 2021 by TTRfan
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