Has anyone used the new 20mm Amal on a standard capacity Tiger Cub motor? How does it perform, particularly on a "snap" throttle opening off low revs? Is it as good as the cheap "pit bike" Mikuni type carbs? Comments appreciated.

 

  Cheers.

lot of folks in yarkshire will be abe to give you an answer soon as foriegn carbs have been banned from 2017

 

lot of folks in yarkshire will be abe to give you an answer soon as foriegn carbs have been banned from 2017

 

No old Spanish Amals then?

I think the whole point of the exercise is to bring in to line the use of 'British style' carbs on the pre 65 bikes even though the concentric carb was not available pre 65 !

This is possible now that a 20mm version is available, I don't think the Spanish made a 4 stroke version of a 20mm carb or even a 20mm one at all.

It's not currently listed in their carburetter settings and spare parts booklet but is apparently supplied with a number 3 slide, 100 main, 106 needle and premier pilot jets and is not mentioned as being specific to a Cub.

Hi Guy's,

 

Hi Deryk,

 

Been doing homework all-day on the concentric carb and its problems.

 

 And the more I delve the more I find that this carburettor is not as simple as it seems.

 

It has a lot more problems than you would think.

 

And I can now see why they have started to manufacture it in aluminium,

 

So if you are thinking of buying one of these carburettors, buy the aluminium version even if it is more expensive.

 

The pilot jet with todays fuels is the main problem, but I think Burlen have now sorted  this with a new system, or at least revised.

 

Regards Charlie.

 

Interesting reading. With reference to Charlie's post, hopefully Burlen have sorted any issues, however until an independent body confirms that they have, I'm lacking the confidence to buy one. Maybe it's a bit too soon for any feedback.

cubs have been ridden for years elsewhere with brit carbs they dont seem to all struggle.. not that long ago one won the pre65 ssdt..

 

Hi Guy's.

 

Hi TS.

 

I seem to remember one of the Cubs that won  the Scottish two day trial was sporting a Villiers, Carburettor.

 

I can't remember what the Paul Heys  bike used though.

 

Regards Charlie.

Chances are that they were not 199's, so therefore wouldn't tend to suffer so much from the "gasping" off low revs,if given a handful of throttle.