XBR 600CC Covertion

[SteveC#222]

I know that we are the middle of a heatwave BUT I've been thinking about a possible winter project. 

Since reading the White Brothers GB500, 600cc convertion article, I've quite fancied try something along those lines on my XBR.

I wasn't planning on anything too silly as I'm more interested in mid range than ballistic top speed. The current idea is to use an XL600 barrel/Piston, possibly uprated carb/filter and getting the inlets cleaned up a bit.

Has anyone out there done this? if so any advice would be welcome and at the end of the day is it worth doing?

[squirrelciv]

Not yet, but thats the plan for Abigail. I think I'm a few years away yet, so if you should do it first please keep lots of notes. I will be asking questions :-)

[SteveC#222]

Yeah, I know what you mean Pat,....I didn't say WHICH winter!  But seriously I think I know where I can get a decent XL600 barrel and Mainjet do a ready jetted mikuni flatslide kit (Shame it's 270 euros!), but if its worth the effort I can at least start to get the bits together. ;-)

[guest7]

It's probably best if I pass this query on to one of the guys on the XBR forum, he's done all these mods.

I'll mail him to see if wants to chat to you.

GC

[Richard 003]

I wasn't planning on anything too silly as I'm more interested in mid range than ballistic top speed. The current idea is to use an XL600 barrel/Piston, possibly uprated carb/filter and getting the inlets cleaned up a bit.

If you can get a complete NX650 engine, that's easier. Plus you can get a Wiseco piston for them ;-)

[Ian]

XBR 500 92 x 75 bore x stroke
XL600 R 100 x 75 bore x stroke
XL600 RM / LM 97 x 80 bore x stroke

So make sure you buy a XL 600 R barrel ..
This bolts straight on ..
High compression pistons are available ..

The only problem I can remember is the little end is smaller on the 600 .
Just get a small bush turned up . or is the other way /?/ to much sun ?
It's a few years since I looked in to doing one !

Please feel free to ignore this post as I know jack sh#t

[Richard 003]

As the XBR and GB500 share their engines, see also:

http://www.thumperpage.com/articles/GBprep.html
http://www.thumperpage.com/articles/gb-500faq.html