TRIUMPH TIGER CUB AMAL PREMIER CARB SETTINGS.

[chappo]

I’ve recently purchased a 1965 Tiger Cub. It’s been bored to 220cc.

The previous owner has fitted a new Amal Premier carb 622 /301.

103 needle jet.

130 main.

19 pilot jet ( 2 rings on the jet ).

slide 622 / 3.5

no numbers on the needle but two rings on the top, set at position 3 ( lowest ).

The bike starts ok, ticks over fine but at a trial on Sunday it displayed all the features of fuel starvation mid section.

In two sections she just stopped and wouldn’t start until I depressed the carb plunger as if starting from cold. Then fired into life.

Strangely she was fine between sections, no hint of starvation.

Baffled to say the least, just hoping to compare setting with anyone running an Amal Premier.

Lastly the carb is cleaner than a clean thing. No obstructions.

Thanks all.

[b40rt]

Ambient temperatures on the day ? Heat shield between manifold and carb ?

Edited June 13, 2023 by b40rt

[stpauls]

4 hours ago, b40rt said:

Ambient temperatures on the day ? Heat shield between manifold and carb ?

I was thinking that before I read your post.

 

[chappo]

Well, a new float and needle jet seems to have fixed it. Had it running for 20 mins, stopped it a few times and restarted it first kick without the need for plunger tickling. Rode it 2 miles on the road. But I will look at a heat shield. 
Thanks for your help guys.

PS . It was exceptionally hot the day of the event 28 degrees, well, hot for the UK.

Edited June 22, 2023 by chappo