XR2 jets

oxo · 29-07-2010, 09:56 AM

Hi all,
Soon gonna be running in my XR2 after putting new pistons & rings in. Is it safe to do so with the existing jets in or should I install original spec running in jets?
Don't wanna see all my hard work turn into pig iron!

HT20 · 29-07-2010, 06:31 PM

Hi.

Depending on witch model XR2 you have, there are two main types of carbs.

One lists the 0.68 as running jet and .072 as break in.(pumper carb.)

The other model carb(non pumper) lists the .080 as running jet and cant find the break in jet... hope this helps.

oxo · 29-07-2010, 10:23 PM

Many thanks,
No idea what's on it to be honest! Is there a difference in appearance between the two types of carb?

HT20 · 29-07-2010, 11:41 PM

Yes there is...

The older pumpercarb has a couple of "lines" cast into the top of the carb, and has only one float, making it a little more compact. (.068)

The newer carb has a plate on top, type gold of color with two yellow bleed lines coming out of it, this carb also has two floats in it.. (.080)

oxo · 30-07-2010, 07:23 PM

Many thanks,
I'll have a good gander tomo

oxo · 11-08-2010, 08:45 PM

After a good look it seems I have the later style wahlbro? WHM carbs, the jets fitted in them are .072 any idea what the run in jets should be for these?

HT20 · 13-08-2010, 04:37 PM

Probably .080 if it is the later carbs.