Blimey thats a large one.

Timus · Senior Member

Blimey thats a large one.

Phil · Senior Member

Was it already installed on your new 250 or is that you installing it now Tim biggrin

Timus · Senior Member

Just put it in today, with lots of much needed help from Mike. Its really quite a simple operation, and it all went pretty smoothly. The old one was an HT Racing kit, the new one is KTM SXS - performance parts from KTM. From what I've read and heard the HT kit is supposed to be a bit better, but you have to send you barrel to the US to get it done, whereas the KTM stuff is a straight replacement - you get a new barrel that bolts straight on.

I was going to take the top end off the old one, but after a bit of thought decided on a new one. It really is a much better bike as a 350, and although its the same weight as a 400, the lighter crank and close ratio gearbox mean it feels lighter, nimbler and more lively. I thought long and hard about what to replace it with, and came to the conclusion that I liked the old one so much I really just wanted another one the same.

Captain Slow · Senior Member

That's interesting Tim, I always thought your bike was quick anyway. Now, can you tell me how to change my 400 into a 990 Adv??

. Bob

Withybrook · Senior Member

Is the head the same.. has it put the compression ratio up and did you have to re jet the carb.... ???

Timus · Senior Member

No changes to the head, or the stroke, so think this means same compression but I could be wrong. Its 12 to 1 on the bike as standard.

The rejet kit comes with it - bigger main, bigger pilot and a different needle.

Timus · Senior Member

Captain Slow wrote:

That's interesting Tim, I always thought your bike was quick anyway. Now, can you tell me how to change my 400 into a 990 Adv??. Bob

I think that might be a bit more complicated Bob. Suggest the only option is a visit to JD's with a big bundle of cash.