XT250TL race bike project - dumb idea?

[Nathan S]

Not to try to set the world on fire, just as something fun to tinker with (and because I need another project... )

Anyhow, the basic idea is to take a humble twin cam XT and fit the following parts from a YZ250K:
Forks, TLS brake, rear shock, swing arm, wheels, tank, seat.

The XT is listed as being ~118kgs in full road trim, so I'm kinda figuring that I should be able to get it down to an honest 110kgs or thereabouts.

Anyone got any idea whether this is possible (mostly the swing arm swap).
Carby solutions to get away from the twin carbs?
Anything else?

I've got the YZ-K bits, which is why I'd like to use them.
I also started a similar project with a single cam XT250K (IT250J forks, YZ400F swing arm, blah blah), but lost interest.

[Tim754]

Nathan I think you would lose interest in that one too. Lots of work for pretty much dull uninspiring performance in an improved frame.. Cheers Tim

[mboddy]

You need to get a good night sleep Nathan. You are delirious.

[Hoony]

I did a regional MX race series on a 1980 TT250G, an ill handling sludgy land crab.

forget it, like the rest said for the effort involved you will be uninspired to ride it.

having said all that it was a fun bike to ride not race when i was 16 and learning to pull mono's.

[rocketfrog]

I shoe horned an XT 250k 2 valve into a YZ250G Roller as one of my first bikes, modest power, but carb and pipe upgrades as well as a custom aluminium airbox and some mild port and valve work yielded very satisfying results. I reckon youd be best cramming the XT donk into a YZ roller FWIW

[Tony T]

Gees you'd piss some people off when you beat them though, Nathan. 
Now that I'm getting old, I kinda like bikes that you can ride to their limit...................

[LWC82PE]

yeah i asked a local guy who races a KLX250 in trials and asked him what he thought of the gutless motor and isnt it too slow, but he just said yeah its slow but the good chassis/suspension just allow you to really easily ride the bike  real hard and push it to the max. He said its way better than his TT500's and could go quicker on the KLX.

i was also thinking you could be better to fit XT motor into a YZ or IT chassis

[evo550]

Don't worry about a pissy little 250 leith, here's the answer right here, and all the hard work's done.
http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MESELX:IT&item=230321257980

[DG 26]

Gday Nathan
I think it would be a great race bike  if you could find one ? 
The others just don;t want you to beat them   
Cheers
don

[LWC82PE]

thats a real nice bike evo550, but its not me whos interested. Nathan might be though?

[Nathan S]

Nah, Nathan is far too soft for a big-bore race bike.
But I do think its a cool bike - it was the inspriation for my aborted XT-K project.

[cloggy]

Nathan was asking about the twin cam motor. Everyone's wittering on about the single cam one. 

[vandy010]

i rode a TTR250 in with the moderns for a long time before upgrading it to a 250 2smoker and reckon my corner speed was faster on the little TTR.
everyone looked at it, shook thier heads and wanderd off muttering something about an overweight/underpowered pig but they never knew or understood how big that smile under my helmet was.
it'll be a fun bike if you build it and probably quite reliable to boot.

[Tim754]

Not me I was referring to the "early twin cam", XT . Like the single cam they gave heaps of play fun to lots of punters but they were/are no racing bike engine, not without bags of time and cash, then reliability is very compromised. Cheers Tim

[LWC82PE]

is the early  84? twin cam/4 valve XT 250 the same motor as the 86 onwards TT250? (white an red with radiator air sccops) I cant find any workshop manual anywhere for a 86 TT 250 and have been looking for over a year