Thumper Club Forum

Club House => Chatter => Topic started by: Richard 003 on August 13, 2008, 12:19:16 PM

Title: Boring post about valve clearances, sorry
Post by: Richard 003 on August 13, 2008, 12:19:16 PM

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

Title: Re: Boring post about valve clearances, sorry
Post by: SteveC#222 on August 13, 2008, 04:59:12 PM

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  :-\

Title: Re: Boring post about valve clearances, sorry
Post by: pigafetta on August 13, 2008, 09:22:33 PM

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

I dunno about the NX650 either.

Dave

Title: Re: Boring post about valve clearances, sorry
Post by: 002 on August 13, 2008, 09:58:23 PM

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

Jethro

Title: Re: Boring post about valve clearances, sorry
Post by: Richard 003 on August 14, 2008, 12:19:39 PM

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?