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Greetings from NC
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Hello every one my name is Burton.  I  love this TTR page this has been a big help. My son is racing a 03 TTR250, got a 10th 7th 6th 4th place he has a youtube channel blaine125 where he posts videos of his races.  This is his second year at racing the TTR250.

We put an FMF exhaust on it that helped ,rebuilt the suspension emulators in front forks.  Have a 13 tooth front sprocket, 54 tooth rear sprocket, with a 520 chain.  I just ordered the Forseti HP racing ignition coil yesterday from Australia.  Adjusted the carb throttle stop, which gave it more throttle.  Motor is stock.  My son is one of very very few running an air cooled engine.  He races in the Mideast hare scrambles.  And he is the only TTR250 out there on race day. 

I read somewhere on this forum that the TTR250 is well known for winning national enduro championships in Australia.  So I know that this TTR250 has more to offer, I think, so if anyone can please help with any other suggestions that I may be able to try, we would really like to get a 1st place plaque on the wall with this bike.

 

Thanks so much



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Hi Burton and welcome.
its good to see someone racing a TTR they mightn't be the latest and fastest but in the right hands still can surprise riders on later model bikes especially in tighter riding conditions like you guys have in those mideast hare scrambles. They are a bit heavy but carry their weight low so turn well whilst still being stable in the rough. And it will run for season after season with just oil changes and filters.

13/54 is pretty short gearing i reckon you could lose a couple of teeth off the back sprocket and not give up too much acceleration and spread the gears out a bit and gain some top speed.
If you have a pipe already, make sure you have pulled the snorkel out, or, added extra airbox holes, and jet accordingly. Our Aussie bikes have a restrictor at the back of the header pipe which we cut off, I don't think US bikes got that. You can also grind down the welds in the front of the header pipe, bit of restriction there, helps with top end. Strip as much weight off it as you can, ie pillion pegs, tool boxes, lighter headlight or race plate etc. If the suspension has been set up properly there is not much else you can do without throwing more money at it.

Keep fresh tyres on it and it will continue to impress.

Any more improvements will cost $$$. I'm happy, mines had a 2mm overbore, high comp piston, ported head USD forks and Wilburs shock. But I've spent WAY too much now to ever sell it. Mine keeps up with modern enduro bikes in the bush easily. I have a new WR250f as well which is obviously a lighter and faster bike but I ride and enjoy both bikes. I actually prefer the TTR250 in the really tight stuff, the WRF in the faster stuff.

Tell your son to keep the vids coming, I enjoyed watching the TTR tractoring up those slippery hills with other NEW bikes spinning wheels and failing.


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Awesome!  Looks familiar -- get smoked on the straight flats but climb right past those YZs on the hills ... as they flail away at the kicker biggrin



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thank you  for your help .after market TTR250 parts are getting hard to find her in the united states. been finding them in Australia and the UK. THE bike came out with a 52 tooth rear I had a 54 tooth custom built at rebelgears.com in Tennessee for the hill climes they are steep and my son just goes right up . but now he has some ride time under him I will try a 52 tooth .  the bike has never been rebuilt  and its 03  and if I need to spend money this bike to me is worth it .some of his friends make fun of him but their new yz250f have already  blew up and to maintain them way more to it .I will try out what you have told me to try and thank you for your help .  we are going for a 1st place win with the TTR250



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LOL yes so true . in one race my son came in 6th place the TTR 250 was covered in mud all I could see was the exhaust pipe sticking out of the head so we spent a good half hour cleaning the head before we loaded it on the truck. a lot of the newer bikes overheated and shutdown but the TTR250 finished with on trouble. we are trying to make it faster . thank you



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PlumasDude wrote:

Awesome!  Looks familiar -- get smoked on the straight flats but climb right past those YZs on the hills ... as they flail away at the kicker biggrin


Actually on the longer straights you find you can have a higher top speeds than the MX'ers with the TTR's 6 speed.   They just accelerate and but then top out quicker. If there's enough road the TTR can out run them with superior top speed.!!   Hold it on!!



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Moo


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Shorty header pipe? From the images above looks like its running stock.

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Malcolm, Northamptonshire. West Anglia TRF

1996 TTR 250 Raid

2005 TTR 250 Bluey



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Yes its stock except for the FMF slip.

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Why not write a letter (rather than an impersonal email) to Geoff Ballard explaining what you are doing and what has been achieved and ask for hints and tips on tuning - and maybe ask if he has any go-faster parts he might sell such as race cams or whatever?

He is a TTR250 fan and had some good results on his TTR back in the day so is a good place to start.

Brian



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Exeter, Devon, UK

http://www.ttr250.com  - The one and only dedicated TTR250 FAQ! 
 

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thank you so much I will do that  im fixing to order a pilot jet  52.5 vm28/486 mikuni and a main jet 140 mikuni n102/221 I read here try that to everyone thank you been a big big help to us .



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do you have a address for Geoff ballard



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Try writing to him c/o of his business - see http://www.ballards.cc/contact-us/



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Exeter, Devon, UK

http://www.ttr250.com  - The one and only dedicated TTR250 FAQ! 
 

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Thank you

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Let me know if u find a 52 pilot jet.
I cant find one anywhere!

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I did find one!!  Here's the link to the jet:

 

https://www.rockymountainatvmc.com/p/930/47207/Mikuni-VM28-486-Series-Pilot-Jet

 

Select the 52.5 in the drop down menu

If I can be of any other help, just holler



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Thanx mate.
I was looking for the teikei genuine jet.
Let me know how u go with the mikuni part.
Cheers kris

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