4 replies to this topic

[Neo]

Had a change in circumstances on Monday (new job) so I've taken my bike off the market ... and it feels like Chrismas has come early for me this year.

Now it's back to the never ending search for Trials bike improvement

Had the chance to buy a second hand TRP Shock fitted with the light weight spring (rare as hens teeth) so I took that chance and will be fitting it in the next couple of weeks. Also decided today that it's time I got on and fitted that VHST26 (bought a few months back) and might have time to do this on Sunday.
It came off a GasGas so should be close enough to start her up but after it's fitted I'd like to follow a proven process for tuning the carb, as previously I've kinda done it on gut feel (think) ... I know this is hard question (a black art even) but what steps/checks would you follow to ensure your tuning your carb correctly for a trials engine?

Best of balance.
Neo

[Stork955]

G'day Neo, Get it starting and idling properly first -this will effect the whole range a bit. Next get the slide cutaway right, so you can get the bike off idle -clean acceleration - then set the main jet for wide open, and finally the needle for mid range (everything else) Its no black art - its hepas of trial and error... after all of that you will probably find that it is the same as what you had before...Good luck!

Cheers,

Stork

[Neo]

Thanks Stork,

Just one question... how do I change/adjust the slide cutaway? And when you say "then set the main jet for wide open" do you mean "fit a large main jet"?

Best of balance.
Neo

Edited by Neo, 04 December 2010 - 10:25 PM.

[firedfromthecircus]

Can't help you on the carb tuning but nice one about keeping the bike

Looks real nice in your sale advert.

[Neo]

firedfromthecircus, on 04 December 2010 - 01:54 PM, said:

Looks real nice in your sale advert.

Thanks FFC.
And you can add this lot to that list too.

• Carbon Look Plastic TickBits Frame Guards.
  
• Carbon Look Plastic TickBits Engine (Clutch side) Guard.
  
• Carbon Look Plastic TickBits Full length Folk protectors.
  
• Dellorto VHST 26
  
• TRP Rear Shock ... Replacing the Caby Shock of course

It's around 9AM here and I've just got the bike covered in mud splatter while testing out the new VHST.
I'd forgotten how smooth these Dellorto's are of the bottom and how much dynamic range you can get out of that fuel screw. She's rideable as the VHST came configured but still room for improvement

Best of balance.
Neo

Edited by Neo, 07 December 2010 - 09:14 PM.