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Setting up R1 bike carbs
sonic - 26/4/16 at 08:18 PM

I have just fitted a set of R1 bike carbs to a Pinto 2 ltr engine, it starts and runs, ticks over but does spit occasionally through the zorst. I noticed if you rev it up the revs don't drop quickly but do return back to tick over after a couple of seconds.

All the linkages are free and the butterflies closing, I seem to remember it is down to setup either to rich or weak and body got an idea I can try?, I need to drive it around 25 miles to get it setup on the nearest rolling road.

Cheers

CosKev3 - 26/4/16 at 09:34 PM

Have you added a return spring to the throttle linkage?

As it's quite common for them to be needed,as the bike runs a twin cable set up.

Andi - 26/4/16 at 09:57 PM

quote:
Originally posted by CosKev3
Have you added a return spring to the throttle linkage?

As it's quite common for them to be needed,as the bike runs a twin cable set up.


+1

Norfolkluegojnr - 27/4/16 at 09:36 AM

quote:
Originally posted by Andi
quote:
Originally posted by CosKev3
Have you added a return spring to the throttle linkage?

As it's quite common for them to be needed,as the bike runs a twin cable set up.


+1



+2 I had to add a second spring. It also aids a lot with pedal feel (hands are more sensitive than feet!)

sonic - 27/4/16 at 04:16 PM

No I haven't but the linkage does return quickly back to its stop point and I tried putting my finger on it but it made no difference.

Cheers

CosKev3 - 27/4/16 at 07:00 PM

What jets etc have you fitted?

sonic - 27/4/16 at 07:12 PM

drilled out to 160 and mixture screw turned out 3 turns

CosKev3 - 27/4/16 at 07:21 PM

Needles at standard height?

sonic - 27/4/16 at 07:42 PM

yes

Norfolkluegojnr - 27/4/16 at 08:28 PM

Lightweight flywheel?

sonic - 28/4/16 at 04:32 PM

no, std