Your XT case is probably from a later year that used Nikasil cylinder jug - they had a larger skirt.
So, it looks like Vagabond ran in to this same problem back in 2013: https://www.tw200forum.com/forum/performance-customization/7810-tw230-engine-notes-xt225-ttr230.htmlOkay, here's an odd observation... my TTR225 case has a 76mm bore for the cylinder skirt, but my XT225 case has a 78.5mm bore!
What's going on here? :dontknow:
I just figured out my XT engine uses a different timing chain and sprocket, too. How Special!All the same???? That's crazy talk...!
I was thinking that too, but I also might build it up and keep it.Steve, you have enough momentum going on the original TTR donor motor that perhaps someone wants to chase you partway down the rabbit hole....
I'd like to do what you're doing at some point, if I can ever find a good deal on the parts.I was thinking that too, but I also might build it up and keep it.
When I get the "XTW250" finished, I'll still have the TTR lower end, with the right side (clutch) cover, a good cylinder (excellent, really), and a Wiseco 71mm 10.25 CR piston kit (the cylinder needs to be bored out to use this piston).
I just need to buy another XT/TTR clutch, and one more countershaft extension, and I'll essentially have a TTRW230HP "kit," that could be swapped in one day.
It's funny how these little projects can take on lives of their own!
Dang, that's pretty slick!
They must have signed a 50 year contract for those damned tires!and as if to show the heritage... they even used the same crappy, death wing front tire!
I questioned whether this was an upgrade or not since my original bearing at about 30,000 miles had no wear at all. Personally I think that at least on my bike the oil layer must be perfect lubricating with very little friction at all. Does adding more moving parts cause less wear in this case? That was what crossed my mind.
I questioned whether this was an upgrade or not since my original bearing at about 30,000 miles had no wear at all. Personally I think that at least on my bike the oil layer must be perfect lubricating with very little friction at all.
I think the bushing (plain bearing) is fine, as long as you have oil pressure.Well, maybe it helps that CJ7Pilot is in the ball-bearing business.