32A Decompressor & Inlet Manifold.

[JohnAli]

Appears I have the wrong Inlet Manifold, only realized when I tried to fit the toolbox! Which bike uses this one (pic attached) ?

Also what is missing from my Decompressor (see pic) ? Is it just a screw and plate to hold the cable? Can't find illustration anywhere.

Thanks, John.

[whitehillbillies]

I appear to have the same on my 1960 24TCs with 32A motor.

whitehillbilly

[John Wakefield]

Decompressor looks to have the lever missing where cable fits. Pic shows it fitted to a 1F engine. Villiers Services sell new ones https://villiersservices.co.uk/index...roducts_id=578

[John Pattinson]

The decompressor you have is the type fitted to Bond Minicar to assist starting with a Siba Dynastart, all that is missing is the screw and the little plate that clamps the inner cable, a nipple is not reqd, having said all that it is not needed on a trials bike unless you have a Dynastart. If you remove it the normal Villiers blanking plug will not fit your head. The decompressor that John illustrated is different and is a smaller thread.

[garybam4711]

Barrel is a 33A that is what you put on a 9E bottom end with short rod if you wanted a scramble as the Amal carb bolts straight to barrel you need a 31A barrel that it’s the same conversation but takes the swan neck manifold you have

[John Wakefield]

Gary has identified the problem, I think though that the barrel is a 34A with the thicker flange, this accommodates the 1/4" longer con rod on the 250cc 32A 34A 36A 37A etc engine. If so you need a 32A or 36A barrel. OR you could buy or make up a short straight manifold to replace the swan necked one. As a matter of interest what is you engine number? The 34A 'scrambles' barrel will be ok for trials with the Villiers carb, it will give a bit more go. As John says remove the decompressor and replace it with a blanking plug.

[JohnAli]

I appear to have the same on my 1960 24TCs with 32A motor.

whitehillbilly

Mine is supposedly a 1960 24TCS with a 32A motor as well but there is not enough room to fit a toolbox with swan neck manifold fitted.
Can you post a larger pic as the one you posted is too small to see clearly?

Cheers, John.

[JohnAli]

Gary has identified the problem, I think though that the barrel is a 34A with the thicker flange, this accommodates the 1/4" longer con rod on the 250cc 32A 34A 36A 37A etc engine. If so you need a 32A or 36A barrel. OR you could buy or make up a short straight manifold to replace the swan necked one. As a matter of interest what is you engine number? The 34A 'scrambles' barrel will be ok for trials with the Villiers carb, it will give a bit more go. As John says remove the decompressor and replace it with a blanking plug.

Engine No is 863B 802 and according to letter from GRA it is the original engine that was fitted when bike left the factory on 3/11/1959.
There is a number stamped on the barrel but difficult to make out.
I have a blanking plug but as I also have the lever and cable I thought I might as well fit a decompressor.

Cheers, John.

[JohnAli]

The decompressor you have is the type fitted to Bond Minicar to assist starting with a Siba Dynastart, all that is missing is the screw and the little plate that clamps the inner cable, a nipple is not reqd, having said all that it is not needed on a trials bike unless you have a Dynastart. If you remove it the normal Villiers blanking plug will not fit your head. The decompressor that John illustrated is different and is a smaller thread.

Thanks for the ID. I have a blanking plug from Villier Services that fits. I may now buy the correct decompressor as I have the lever and cable anyway.
Cheers, John.

[John Wakefield]

Engine No is 863B 802 and according to letter from GRA it is the original engine that was fitted when bike left the factory on 3/11/1959.
There is a number stamped on the barrel but difficult to make out.

Cheers, John.

863B is a 32A (250cc trials or road) The barrel flange is the thicker one, so barrel is a 34A (250cc scrambles) part numbers for cylinder are 32A C11779 or C11785, & the 34A B11910

[JohnAli]

863B is a 32A (250cc trials or road) The barrel flange is the thicker one, so barrel is a 34A (250cc scrambles) part numbers for cylinder are 32A C11779 or C11785, & the 34A B11910

Thanks for that, appreciated.

Cheers, John.

[johnrunnacles]

Those are cylinder head part numbers, John, not barrel numbers. Cylinder for the 32A is C11768, that for 34A is A11585.

[John Wakefield]

Those are cylinder head part numbers, John, not barrel numbers. Cylinder for the 32A is C11768, that for 34A is A11585.

Thanks John

[whitehillbillies]

Hi John.
Pic of inlet. Can take more if needed.

whitehillbilly

[JohnAli]

Hi John.
Pic of inlet. Can take more if needed.

whitehillbilly

Spot on, thank you!

Cheers, John.