Boring post about valve clearances, sorry

[Richard 003]

Can anyone tell me the "official" valve clearances for

(a) XBR500
(b) XBR500 after Honda changed the recommendation in a vain attempt to prevent stalling
(c) NX650

?

I'm trying to decide on the optimum clearances for my GB650, whose engine is from an NX650 but has some of the character of an XBR - ie it continues to make "power" higher up, due either to the removal of metal from inside the head, or the cam, or both (I didn't build it and have not looked inside).

Cheers
Richard

[SteveC#222]

The 'official' Honda manual settings for XBR (F) are:

Inlet        0.10mm (0.004in)
Exhaust    0.12mm (0.005in)

Don't know about the NX650 - Ken   - Kerebo - might know 

[pigafetta]

Hondas 'revised' tappet settings for the XBR are are 0.15mm inlet and 0.19mm exhaust.

I dunno about the NX650 either.

Dave

[002]

NX650 are the same as XBR
Inlet 0.10mm
Exhaust 0.12mm
The SLR,Vigor and FMX are all the same aswell.

Jethro

[Richard 003]

Thanks all. Three questions answered in three posts. That's what I call efficient ;-)

Regards
Richard

PS - I'm toying again with selling the XBR outfit. Does anyone want an outfit?