Revving problem

General Biker Banter
User avatar
lloydie
Posts: 20928
Joined: Mon Jan 17, 2011 11:16 pm
Location: In the garage somewhere in Coventry

Re: Revving problem

Post by lloydie »

Chris sweets wrote:Amcq where abouts are you? It's starting to get decent weather now so I'm dying to get out on it
His is yellow so he'll be along at some point !!
Chris sweets
Posts: 13
Joined: Sun Feb 26, 2017 12:41 pm

Re: Revving problem

Post by Chris sweets »

Just lifted the tank, removed the two pipes from the bottom of the petcock and no fuel coming out
User avatar
AMCQ46
Posts: 16740
Joined: Mon May 11, 2009 4:54 pm
Location: Worcestershire / Warwickshire border

Re: Revving problem

Post by AMCQ46 »

Chris sweets wrote:Amcq where abouts are you? It's starting to get decent weather now so I'm dying to get out on it
just off the A422 10 miles east of Worcester. normal ride will take me past yours on the A44, but i haven't even been out yet!
AMcQ
User avatar
AMCQ46
Posts: 16740
Joined: Mon May 11, 2009 4:54 pm
Location: Worcestershire / Warwickshire border

Re: Revving problem

Post by AMCQ46 »

Chris sweets wrote:Just lifted the tank, removed the two pipes from the bottom of the petcock and no fuel coming out
that is normal, you need the engine running to generate a vacuum to open the petcock. hence if diaphragm is damaged it won't open
AMcQ
Chris sweets
Posts: 13
Joined: Sun Feb 26, 2017 12:41 pm

Re: Revving problem

Post by Chris sweets »

Right so the bike has to be running when you disconnect those fuel lines to check the diaphragm?
User avatar
AMCQ46
Posts: 16740
Joined: Mon May 11, 2009 4:54 pm
Location: Worcestershire / Warwickshire border

Re: Revving problem

Post by AMCQ46 »

Easier if you put a long bit of pipe onto the nipple on the back of the pet rock and suck
AMcQ
Chris sweets
Posts: 13
Joined: Sun Feb 26, 2017 12:41 pm

Re: Revving problem

Post by Chris sweets »

So it could still be the diaphragm?
Chris sweets
Posts: 13
Joined: Sun Feb 26, 2017 12:41 pm

Re: Revving problem

Post by Chris sweets »

Just started it up to see if the battery had died (didn't ride it) started fine, held it at 3000 revs, no fluctuation at all

Am I right in thinking it's not a timing issue? Surely if it was a timing issue, the issue would always be there even on idle
Post Reply