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

DANKWHEELIE420 · DANKWHEELIE420

hello there ttr riders i need help on tuning my bike i live at 750m above sea level and need help on making my bike get the best power

Slick Nick · Slick Nick

My carb slide sticks up when you let the throttle out slowly my carb was out yesterday and I tightened the retention screws and it worked for a lil but it's back how it was

FBRConcepts · FBRConcepts

https://www.amazon.com/Cable-Carbrettor-Accelerating-Yamaha-TTR250/dp/B06X...

FBRConcepts · FBRConcepts

Hey Guys, I spent a few hours sifting through stickies and threads looking for information on jetting the carb on my fathers new bike for some mods we are getting ready to install. I am hoping to order some jet sizes that will get us dialed in before hand. Bike: 2005 TTR 250 US Model Elevation: Sea Leve...

leigh · leigh

Posting this here so others might see it, it you need to remove the float from your carby read the post below. Worked so easily for me and I'd been dreading the thought of ever needing to do it. Pin popped out in a few seconds and the same to put it back in. http://ttr250.activeboard.com/t61485128/re...

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

Topic		Started By	Replies	Views	Last Post
	tuning on elevation (Preview) hello there ttr riders i need help on tuning my bike i live at 750m above sea level and need help on making my bike get the best power	DANKWHEELIE420	0	958	Jul 2, 2017 by DANKWHEELIE420
	Carb slide sticking (Preview) My carb slide sticks up when you let the throttle out slowly my carb was out yesterday and I tightened the retention screws and it worked for a lil but it's back how it was	Slick Nick	6	2060	Jul 2, 2017 by DANKWHEELIE420
	Jaguar Pro TTR 250 Carb? (Preview) https://www.amazon.com/Cable-Carbrettor-Accelerating-Yamaha-TTR250/dp/B06X...	FBRConcepts	4	2175	Jun 16, 2017 by FBRConcepts
	Carb Jets for mods on 2005 TTR 250 (Preview) Hey Guys, I spent a few hours sifting through stickies and threads looking for information on jetting the carb on my fathers new bike for some mods we are getting ready to install. I am hoping to order some jet sizes that will get us dialed in before hand. Bike: 2005 TTR 250 US Model Elevation: Sea Leve...	FBRConcepts	0	1474	Jun 16, 2017 by FBRConcepts
	I love this website! - float post pin removal (Preview) Posting this here so others might see it, it you need to remove the float from your carby read the post below. Worked so easily for me and I'd been dreading the thought of ever needing to do it. Pin popped out in a few seconds and the same to put it back in. http://ttr250.activeboard.com/t61485128/re...	leigh	0	1163	Jun 16, 2017 by leigh
	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	2317	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	1638	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	1627	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	1932	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	10722	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	2076	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	1055	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	1364	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	12864	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	902	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	1571	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	7	2782	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	1606	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	3608	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	1402	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	1045	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	2308	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	958	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	2409	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	1211	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	5952	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	1211	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	3232	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	1736	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	1251	Mar 13, 2016 by TTRfan
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