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

James from Oz · James from Oz

Hi there, Has anyone removed there airbox and replaced there air filter with a foam air filter / Uni-Filter that goes staright on to the carby and what advantages/ disadvantages did it have ? I removed my original filter set up on a small engine Honda CRF and fitted a foam one and it made such a differenc...

Gauguin · Gauguin

Hi Im having a bit of a mare getting my '06 blue OE dialled in right, I've scoured these pages plus some others but can't seem to find the answers so I'm reaching out... The bike is running stock exhaust and un-modded air box with stock filter. It came to me with 50 pilot and 147 main which I believe is stan...

Pat · Pat

hi just finished putting the carb back on my ttr 250 open enduro had a few problems before hand with what seemed to just be blocking up, so I've pulled the bowl off and given a good clean with carb cleaner and now it's back on it wants to idle really high on choke and then run for a little bit when the chokes pus...

haney4147 · haney4147

I recently purchased an 02 ttr250 that had been sitting for a couple years. It had an fmf exhaust and top of airbox cut up, but factory jets in carb. I replaced the exhaust and airbox with factory items then cleaned the carb. Had to replace all orings, accelerator pump diaphragm, needle and seat. The mix...

Jonduggar · Jonduggar

Hey guys i bought a ttr250 :) But it didnt have a carb on it :*( Ive read a bit amd shopped around the oem carb is to rich for me.. so ive turned to the tm33 mikuni. Is there a certain set of cables i should buy along with it? Anyone please help! Thank you!

petenz · petenz

https://www.aliexpress.com/item/microsquirt-II-based-EFI-motorcycle-Motorbike-Motocross-ATV-scooter-small-engine-Electronic-Fuel-Injection-kit/32786077851.html?spm=2114.01010208.3.2.8hQ9ft&ws_ab_test=searchweb0_0,sea...

admbnm · admbnm

i am going through my bike bits and have come across a spare ttr carb,good visual condition but not to sure about gaskets/diaphragm,no broken parts,everything moves freely etc, i got ages ago with a complete go-cart motor and forgot all about it,i have no use for it anymore.is it worth buying/fittin...

mr_diver · mr_diver

Ok I know alot of people don't like them, but what's the consensus on here? There was one fitted to my Super Sherpa and I liked it. Prime for 5 seconds, a little choke, turn the key, running engine... Turn engine off... Walk away with no worries. I'm also used to FI bikes and this fuel tap on the TTR has me co...

DonP · DonP

Hello all and Happy New Year, I'm fitting a TT-250R engine into another chassis . engine upgrade 325cc kit and Web camshafts. I have purchased a TM38 Carb/pump which was set up for an XR400 but the carb is physically very big and I'll have clearance problems. My question is do you think a VM36 carb would b...

Tarbone · Tarbone

Hello everyone! Question! I've got a 2000 ttr250 blue tank model. The problem I'm having is with the choke. When I initially start the bike, I pull the choke knob outward and start the bike. As soon as the bike is running, I push the knob in half way and let the bike warm up. Naturally the RPM is elevated...

Dr_B · Dr_B

I finally found out why my pet**** only ran on reserve and how my carb got so gunked up thankfully I decided to change my pet**** before I put the newly clean carb on and saw the image below. cleaned the tank, put a new pet**** on, charged the battery Finally after close to a month from my initial post abou...

Sprok · Sprok

I have a leak from the port at the right bottom of the bowl. Anyone know what this port is for? Is it supposed to the covered/blocked or something? I just did a full rebuild on the carb and most of the gaskets/rings/diaphragm/etc are new. According to receipts from the previous owner a dealer replaced th...

Trask · Trask

Put a Koso 32mm on runs and idles good but bogs out completely from 0-25 % Throttle. I don't know what to do.

Trask · Trask

Wondering if anyone has some experience on replacing the stock Carb in a 2005. Someone broke the inside wall of the Carb probably dropped it and tried repairing it, with ghetto procedures. Now it has a bad bog mid throttle. Just looking for good replacements instead of buying another stock one for $40...

marcusp · marcusp

Hello I have just got myself a 52.5 Mikuni pilot jet and I have noticed the pilot jet is a lot longer than the original jet I was wondering if anyone would recommend taking the white fuel splash shield that goes around the main jet off. To me it looks like it may affect the flow to the pilot jet and if i wa...

stewy2603 · stewy2603

Hi all, I have the white tank TTR250 Open Enduro, I believe 1994ish. Since I've bought it, it has an annoyingly fast idle speed with the choke on. I have the manual but I cannot see a section which describes how to adjust it. Any help would be appreciated! For reference: I tried turning it in, but it doesn'...

TTRfan · TTRfan

I had put a spare tank on my 325 to use whilst I put a new set of decals on the original. The tank had a new fuel tap on so I didn't bother to take it out for inspection. I actually got around to stickering up the original tank today so decided to drain the spare tank of fuel before taking it off. It seemed odd that...

TTRVN · TTRVN

I have been playing with jets on my 1996 Raid lately. My bike has the snorkel out, no restrictor. Before it ran fine, but the first 1/4 was weak so I changed the #50 pilot to a 52.5. The new power was instantly noticeable. However, beyond about 1/4 -1/3 it weakens for a bit, then picks up again. Every singl...

Shed71 · Shed71

Hi there. Just recently got myself a ttr and it rums a fcr33. I have just took it off to clean it out as it overflows if the engine is switched off and fuel is on. Does anyone else have experience of these carbs? If so what jets do you use and have you any advice?

mossproof · mossproof

Been fiddling around with the jetting on my 325 recently as I've got the loan of an Air/fuel ratio meter and header pipe with lambda sensor boss. (Oh, and I've got no wife/kids/life ) The 325 runs nicely on 50 pilot/147main jets, needle clip 1 notch above middle. Motad exhaust, Twinair filter and mild...

Paul C · Paul C

I was given an 04 TTR by a good friend. It hasn't run for a few years. I started it a few weeks ago and it kept cutting out. Because of the long lay off I suspected carb issues. I have removed, stripped and cleaned the carb but used no new o rings etc. I'm pretty sure somebody with a heavy wrist has had a go at the c...

TTR250RIDER · TTR250RIDER

I want to go up jet sizes on my 1999 ttr250. Wanting to know of any good jet brands and what size to use for the teikei y30p carb. Any help is appreciated thanks. I am planning on getting an fmf powercore 4 And a k&n air filter also -- Edited by TTR250RIDER on Monday 30th of May 2016 05:30:19 AM

Alf c h · Alf c h

Have this problem on my 2001 model. Bike not run for 6weeks. After 1/2 hr to the first trail uphill then on tarmac for about a mile then all of a sudden miss-fire cruising about 1/2 throttle. Instant thought fuel, so switched to reserve:- Symptom remains? Bike has been running perfect since new. Fitted...

nelly · nelly

hi guys whilst the ttr is currently balancing on the stand with no forks I thought id get a few things done, new rear tyre ,better clearance now with 13t up front,new front tyre fitted too sort of re-routed the clutch cable to give an inch more length,high bars made it very very slightly pull on full lock,...

irishttr250 · irishttr250

hi i bought a 2000 ttr 250 which someone had been at the carb settings,does anyone know the correct settings any help would be great

Tommy the cat · Tommy the cat

Ok just went out for a blat and bike died on me... basically it will tick over but dies if I rev it....she won't even pull off. I had a problem with her a few weeks ago that when I reved her I had a flat spot when I grabbed a fist full but I thought maybe previos owner had old fuel in it.... Any way I'm guessing crap...

locky · locky

Wonder how well a xt250 carb would fit ? The cables look like they would be a straight fit and it's a pumper carb like the original. The Teikei carb seems to be getting very rare so could this be a good replacement ? Being Mikuni spares would be available and iv'e seen service kits on ebay. Think i'd give one...

Mikeycathlab · Mikeycathlab

bike would not start so took out plug,black and sooty. removed carb to service and follow excellent Sticky removed bowl to find this looks like an interesting weekend following another Sticky on how to repair the post off to look round the Theatres at work to see if I can find a suitable peice of metal to...

Keith89 · Keith89

okay so I have a keihin 38mm carb off a yz250f mounting it isn't a problem it's more can I use this carb without plugging in the tps sensor????

aussiedeuce · aussiedeuce

Is there a part number for a carby repair /rebuild kit?

Topic		Started By	Replies	Views	Last Post
	Has anyone removed an air box and just used a uni-filter / slip on foam filter direct to the carby? (Preview) Hi there, Has anyone removed there airbox and replaced there air filter with a foam air filter / Uni-Filter that goes staright on to the carby and what advantages/ disadvantages did it have ? I removed my original filter set up on a small engine Honda CRF and fitted a foam one and it made such a differenc...	James from Oz	4	1140	May 14, 2017 by DANKWHEELIE420
	1/3 - WOT Issue (Preview) Hi Im having a bit of a mare getting my '06 blue OE dialled in right, I've scoured these pages plus some others but can't seem to find the answers so I'm reaching out... The bike is running stock exhaust and un-modded air box with stock filter. It came to me with 50 pilot and 147 main which I believe is stan...	Gauguin	8	1114	Apr 20, 2017 by ttr steve
	Carb troubles (Preview) hi just finished putting the carb back on my ttr 250 open enduro had a few problems before hand with what seemed to just be blocking up, so I've pulled the bowl off and given a good clean with carb cleaner and now it's back on it wants to idle really high on choke and then run for a little bit when the chokes pus...	Pat	2	731	Mar 29, 2017 by Pat
	Carb problems (Preview) I recently purchased an 02 ttr250 that had been sitting for a couple years. It had an fmf exhaust and top of airbox cut up, but factory jets in carb. I replaced the exhaust and airbox with factory items then cleaned the carb. Had to replace all orings, accelerator pump diaphragm, needle and seat. The mix...	haney4147	4	991	Mar 28, 2017 by leigh
	No carb on TTR I bought! Please any advice or tip will be greatly appreciated! (Preview) Hey guys i bought a ttr250 :) But it didnt have a carb on it :*( Ive read a bit amd shopped around the oem carb is to rich for me.. so ive turned to the tm33 mikuni. Is there a certain set of cables i should buy along with it? Anyone please help! Thank you!	Jonduggar	6	6352	Feb 23, 2017 by TTRfan
	Fuel injection kits - I wonder how well these work...? (Preview) https://www.aliexpress.com/item/microsquirt-II-based-EFI-motorcycle-Motorbike-Motocross-ATV-scooter-small-engine-Electronic-Fuel-Injection-kit/32786077851.html?spm=2114.01010208.3.2.8hQ9ft&ws_ab_test=searchweb0_0,sea...	petenz	3	863	Feb 8, 2017 by petenz
	s/hand carb (Preview) i am going through my bike bits and have come across a spare ttr carb,good visual condition but not to sure about gaskets/diaphragm,no broken parts,everything moves freely etc, i got ages ago with a complete go-cart motor and forgot all about it,i have no use for it anymore.is it worth buying/fittin...	admbnm	4	526	Jan 31, 2017 by petenz
	Auto fuel taps (Preview) Ok I know alot of people don't like them, but what's the consensus on here? There was one fitted to my Super Sherpa and I liked it. Prime for 5 seconds, a little choke, turn the key, running engine... Turn engine off... Walk away with no worries. I'm also used to FI bikes and this fuel tap on the TTR has me co...	mr_diver	8	808	Jan 26, 2017 by BM Steve
	VM36? Skyteam Ace 125 with 315cc TTR engine conversion! (Preview) Hello all and Happy New Year, I'm fitting a TT-250R engine into another chassis . engine upgrade 325cc kit and Web camshafts. I have purchased a TM38 Carb/pump which was set up for an XR400 but the carb is physically very big and I'll have clearance problems. My question is do you think a VM36 carb would b...	DonP	14	8349	Jan 10, 2017 by TTRfan
	Choke problem. (Preview) Hello everyone! Question! I've got a 2000 ttr250 blue tank model. The problem I'm having is with the choke. When I initially start the bike, I pull the choke knob outward and start the bike. As soon as the bike is running, I push the knob in half way and let the bike warm up. Naturally the RPM is elevated...	Tarbone	3	401	Dec 30, 2016 by ttboof
	Only running ethanol free from now on (Preview) I finally found out why my pet** only ran on reserve and how my carb got so gunked up thankfully I decided to change my pet before I put the newly clean carb on and saw the image below. cleaned the tank, put a new pet** on, charged the battery Finally after close to a month from my initial post abou...	Dr_B	3	771	Dec 24, 2016 by texasT
	What is the port on the lower right side of the bowl for? (Preview) I have a leak from the port at the right bottom of the bowl. Anyone know what this port is for? Is it supposed to the covered/blocked or something? I just did a full rebuild on the carb and most of the gaskets/rings/diaphragm/etc are new. According to receipts from the previous owner a dealer replaced th...	Sprok	14	1792	Dec 14, 2016 by mossproof
	New Carb (Preview) Put a Koso 32mm on runs and idles good but bogs out completely from 0-25 % Throttle. I don't know what to do.	Trask	5	854	Nov 7, 2016 by Trask
	Carb Replacements! Carb 2005 (Preview) Wondering if anyone has some experience on replacing the stock Carb in a 2005. Someone broke the inside wall of the Carb probably dropped it and tried repairing it, with ghetto procedures. Now it has a bad bog mid throttle. Just looking for good replacements instead of buying another stock one for $40...	Trask	6	1805	Oct 11, 2016 by petenz
	carby pilot jet help please (Preview) Hello I have just got myself a 52.5 Mikuni pilot jet and I have noticed the pilot jet is a lot longer than the original jet I was wondering if anyone would recommend taking the white fuel splash shield that goes around the main jet off. To me it looks like it may affect the flow to the pilot jet and if i wa...	marcusp	2	643	Oct 2, 2016 by marcusp
	Fast Idle Speed Adjustment (ie Choke) (Preview) Hi all, I have the white tank TTR250 Open Enduro, I believe 1994ish. Since I've bought it, it has an annoyingly fast idle speed with the choke on. I have the manual but I cannot see a section which describes how to adjust it. Any help would be appreciated! For reference: I tried turning it in, but it doesn'...	stewy2603	3	458	Aug 19, 2016 by stewy2603
	The effect of storing a tank with fuel in (Preview) I had put a spare tank on my 325 to use whilst I put a new set of decals on the original. The tank had a new fuel tap on so I didn't bother to take it out for inspection. I actually got around to stickering up the original tank today so decided to drain the spare tank of fuel before taking it off. It seemed odd that...	TTRfan	9	1263	Aug 13, 2016 by fourelms
	Jetting help with 1996 Raid (Preview) I have been playing with jets on my 1996 Raid lately. My bike has the snorkel out, no restrictor. Before it ran fine, but the first 1/4 was weak so I changed the #50 pilot to a 52.5. The new power was instantly noticeable. However, beyond about 1/4 -1/3 it weakens for a bit, then picks up again. Every singl...	TTRVN	0	454	Jul 23, 2016 by TTRVN
	Keihin fcr 33 ...any body use one? (Preview) Hi there. Just recently got myself a ttr and it rums a fcr33. I have just took it off to clean it out as it overflows if the engine is switched off and fuel is on. Does anyone else have experience of these carbs? If so what jets do you use and have you any advice?	Shed71	3	1182	Jul 19, 2016 by honda15i
	Some observations on jetting (Preview) Been fiddling around with the jetting on my 325 recently as I've got the loan of an Air/fuel ratio meter and header pipe with lambda sensor boss. (Oh, and I've got no wife/kids/life ) The 325 runs nicely on 50 pilot/147main jets, needle clip 1 notch above middle. Motad exhaust, Twinair filter and mild...	mossproof	7	656	Jul 9, 2016 by TTRfan
	wont idle without some choke (Preview) I was given an 04 TTR by a good friend. It hasn't run for a few years. I started it a few weeks ago and it kept cutting out. Because of the long lay off I suspected carb issues. I have removed, stripped and cleaned the carb but used no new o rings etc. I'm pretty sure somebody with a heavy wrist has had a go at the c...	Paul C	23	3574	Jun 5, 2016 by masterbill
	Anybody Know of Aftermarket Jetting (Preview) I want to go up jet sizes on my 1999 ttr250. Wanting to know of any good jet brands and what size to use for the teikei y30p carb. Any help is appreciated thanks. I am planning on getting an fmf powercore 4 And a k&n air filter also -- Edited by TTR250RIDER on Monday 30th of May 2016 05:30:19 AM	TTR250RIDER	2	529	May 31, 2016 by locky
	Misfire cruising at 1/2 throttle and higher (Preview) Have this problem on my 2001 model. Bike not run for 6weeks. After 1/2 hr to the first trail uphill then on tarmac for about a mile then all of a sudden miss-fire cruising about 1/2 throttle. Instant thought fuel, so switched to reserve:- Symptom remains? Bike has been running perfect since new. Fitted...	Alf c h	9	1486	May 25, 2016 by Alf c h
	pilot ?? (Preview) hi guys whilst the ttr is currently balancing on the stand with no forks I thought id get a few things done, new rear tyre ,better clearance now with 13t up front,new front tyre fitted too sort of re-routed the clutch cable to give an inch more length,high bars made it very very slightly pull on full lock,...	nelly	26	1107	Apr 26, 2016 by nelly
	carb settings (Preview) hi i bought a 2000 ttr 250 which someone had been at the carb settings,does anyone know the correct settings any help would be great	irishttr250	2	691	Mar 13, 2016 by TTRfan
	Won't run at revs.. (Preview) Ok just went out for a blat and bike died on me... basically it will tick over but dies if I rev it....she won't even pull off. I had a problem with her a few weeks ago that when I reved her I had a flat spot when I grabbed a fist full but I thought maybe previos owner had old fuel in it.... Any way I'm guessing crap...	Tommy the cat	30	1614	Feb 16, 2016 by TTRfan
	Possible carb replacement ? (Preview) Wonder how well a xt250 carb would fit ? The cables look like they would be a straight fit and it's a pumper carb like the original. The Teikei carb seems to be getting very rare so could this be a good replacement ? Being Mikuni spares would be available and iv'e seen service kits on ebay. Think i'd give one...	locky	21	5228	Feb 1, 2016 by Minty
	Carb problem (Preview) bike would not start so took out plug,black and sooty. removed carb to service and follow excellent Sticky removed bowl to find this looks like an interesting weekend following another Sticky on how to repair the post off to look round the Theatres at work to see if I can find a suitable peice of metal to...	Mikeycathlab	3	572	Jan 29, 2016 by TTRfan
	Carb upgrade question (Preview) okay so I have a keihin 38mm carb off a yz250f mounting it isn't a problem it's more can I use this carb without plugging in the tps sensor????	Keith89	0	430	Dec 24, 2015 by Keith89
	REBUILD KIT PART NO? (Preview) Is there a part number for a carby repair /rebuild kit?	aussiedeuce	12	679	Dec 21, 2015 by aussiedeuce
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