Dellorto jetting?

[newmanz]

Hey there

I have just bought myself a genuine Dellorto 19mm PHBG carb and fitted it to my air cooled bike. It idles beautifully but when you try and rev it, it will chug smoke and surge until you have held the throttle back long enough and the revs have picked up... then shes as good as gold.

Just wondering if anyone knows what Jets suit the air cooled motors or whether anyone knows where to get jets from? It's currently jetted for a husqvarna 50cc motor.

Cheers

49cc 2 stroke air cooled (using an S bend HP pipe) and the E2 type (dellorto copy carb) runs best with the .75 # jet ....... tried the .80 # jet first and was bogging down low end too much and hauled arse top end... but the .75# jet gave a very good balanced power delivery

[imdying]

49cc 2 stroke air cooled (using an S bend HP pipe) and the E2 type (dellorto copy carb) runs best with the .75 # jet ....... tried the .80 # jet first and was bogging down low end too much and hauled arse top end... but the .75# jet gave a very good balanced power delivery

Have you ever built an A115 that could use a 19mm carb successfully? Could you build more of them?

[newmanz]

Have you ever built an A115 that could use a 19mm carb successfully? Could you build more of them?

You can easily do it yourself.
Heres the basic setup we have been using:

A115 49cc 2 stroke or similar (air cooled)
S bend HP pipe
E2 HP carburetor ( dellorto 19mm copy )
E2 Jet kit (comes with various jet sizes)
We found on the track the .75 number jet worked best.

Can also use a 1/4 turn throttle controller ( just get or make a slightly longer cable)

If you want serious power then go the pre made A115 GP engine, that thing is flippin crazy power for an air cooled, new ones coming have a new port design for even more power than before.

[imdying]

If you want serious power then go the pre made A115 GP engine, that thing is flippin crazy power for an air cooled, new ones coming have a new port design for even more power than before.

Been considering this for when we've sorted out the water cooled bikes 100%. Could build our own, but if we each buy one of these, then at least our bikes will remain on a level playing fields (rather than one of us doing the cheque book racing thing heh). Cheers