Backfiring on downhill descents

[Minto]

Should anyone need any Amal carbs doing (both Monoblocs and Pre Monos are same prices ) then give him a ring on 02392  580708 after 6pm. His name is Kevin Traill  at Alverstoke Restorations in Gosport Hampshire  he is helpful and likes a chat
and no I am not related in any way and he gave his permission to put his details on here . 
had my pre monobloc sleeved over 2 year ago and still doing well, came back like new for under £50
Regards dave

Nice one, thats a damn sight more swallowable than the price of a new pre-monobloc. Good to have a personal recommendation too.

[Minto]

Screwing the throttle stop right down, so the slide is completely closed, should stop the engine.

Does that not happen?

The way to test for air leaks into the inlet manifold (which can make it hard to slow the idle down) is to have the engine idling and spray WD40 on the joints.  If the engine note changes, there’s a leak.

TT, thanks for the tips.
Nope the engine doesn't cut out when the throttle stop screw is turned right down, guess thats an indicator summat aint right!

Ill give the wd40 trick a go when i can get the beast out of the garage.

[muskrat]

Screwing the throttle stop right down, so the slide is completely closed, should stop the engine.

Does that not happen?

The way to test for air leaks into the inlet manifold (which can make it hard to slow the idle down) is to have the engine idling and spray WD40 on the joints.  If the engine note changes, there’s a leak.

TT, thanks for the tips.
Nope the engine doesn't cut out when the throttle stop screw is turned right down, guess thats an indicator summat aint right!

Ill give the wd40 trick a go when i can get the beast out of the garage.

G'day Minto.
That means the cable is too short and holding the slide up.
Cheers

[CheeserBeezer]

....It could also mean that the slide is so badly worn the carb is drawing air even when the slide is sitting on the base of the carb.

[Rex]

Should anyone need any Amal carbs doing (both Monoblocs and Pre Monos are same prices ) then give him a ring on 02392  580708 after 6pm. His name is Kevin Traill  at Alverstoke Restorations in Gosport Hampshire  he is helpful and likes a chat
and no I am not related in any way and he gave his permission to put his details on here . 
had my pre monobloc sleeved over 2 year ago and still doing well, came back like new for under £50
Regards dave

That's good to hear. He did a couple of carbs for me some years back but I understood (obviously incorrectly) that he'd stopped doing this work.
Recommended.

[dave55]

I hope he hasnt Rex i have a monobloc from another bike to send to him .
A mate of mine sent 2 to him back end of last year and was amazed with quality of his work , said his 59 Bonny had never run as well in the 15 years hes had it , and sent him 2 more from another one of his bikes early this year. so really do hope he hasnt packed up.