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

Bear foot bowhunter · Veteran Member

Help with ttr motard conversion

mossproof · Super Guru

Help with ttr motard conversation

Bear foot bowhunter · Veteran Member

Help with ttr motard conversion

Bear foot bowhunter · Veteran Member

Sorry just found the arrival again its vtr not ctr

TTRfan · Super Guru

Bear foot bowhunter wrote:
I read somewhere cbr250 rims will almost go strait on , is that true ? I may have found a cheep set

Not tried them. Where did you read it - was it a reliable source?

This thread might help http://ttr250.activeboard.com/t44801045/supermoto-conversion-very-easy-alternative-wheels/

Brian

Bear foot bowhunter · Veteran Member

I actually read it on her it was a vtr not ctr as I thought tho

TTRfan · Super Guru

Ah yes - this thread http://ttr250.activeboard.com/t60008649/nice-looking-ttr-motard-rims/

Bear foot bowhunter · Veteran Member

mossproof wrote:
There's a 325cc kit from Thumper Racing (see the threads in the modifications section). We're developing a proper 350cc kit at the moment which will hopefully be less troublesome.
Sumo thread here:

That would be awsome even a300 would be good , iv heard some truly terrifying thing about the diy conversation . what piston would it run? Will it be a full top end change ? Would the carbie need a lot changed ? Will the ttr drive gear Han na power bost ?

mossproof · Super Guru

The largest overbore using the standard barrel gives you 263cc I believe. The 325 requires a new sleeve in the barrel, plus machining of the gearcase to accept it. Top end (head) is unchanged. Carb copes fine but we think it runs a bit rich so smaller jets required.
This from the faq page:

www.ttr250.com/

The 350 we are developing will have a completely new barrel to avoid the hairline crack issues associated with the 325. Awaiting first proof-casting from the foundry at the moment. Watch this space!

Ride safe,

Simon.