Hi ,I have a BEC prop adaptor ,I belive it was from MK,and I am trying to fit it. I have cut of the front joint from the sierra prop and was expecting the adaptor to push in,it wont as the adaptor is about 0.7 mm bigger than the inside diameter of the prop,does anyone know if it just needs turning down to fit,or is it a case of warming up the prop tube and/or pressing in the adaptor,and then weld?

Err, doesn't the prop bolt on to the adaptor? Which in turn replaces the sprocket on the engine.

The propshaft adapter does not fit onto the propshaft. You need a modified propshaft from someone like MK, with the flange to bolt it to.

I'll have a look for a photograph............

Phil

Can't find a decent photograph that I can upload but if you have a look in our build diary (2nd November 03) you'll hopefully get some idea of how it goes together.

HTH
Phil

Down the bottom of this page...

http://www.mnrvortxr1.co.uk/buildpgtwo.htm

A few pictures showing the sprocket adapter.

HTH

Chris.

One like this
Rescued attachment propshaft.jpg

JHC I wont sleep tonight worrying now,

I think I caused some confusion with my terminology.I have the prop adaptor fitted to the bike output shaft,the UJ bolts to that ,it has internal splines,what I am asking about is the externally splined item that is welded into the car prop.Has anyone done the fitting/welding themselves ?

Ah, I think I see what you mean. You have a uj but no prop to attach it to. I'd advise getting a prop company to make a new one with the correct ends on it.

props need to be balanced also 2nd hand sierra onces can be had a heard live on them and have right on pension.

what if it decides to go pension when you puts 100BHP on it @80mph on the high with a car behind you!!

Then you cant brake, you only can hope the chasis is strong enough and the prop donīt reches your ankels?enkels?

it costs me the extra pay of this month to pay the prop (made by bailey morris in the UK)..

but i know that "a prof pop is a prof job!"

TKs

Speak to Dunning and Fairbank in Leeds (I don't have their number to hand unfortunately). They'll sort you out for a very reasonable cost and you get a top job from them!

As Calvinx said, it's not worth taking the risk when it's so close to your plums, and the time you'd spend and the cost of the parts is negligable!

Last time I had a prop made it cost me 95 quid. Done localy and turned round in 24 hours.

I gave them the front end and back end of the existing shafts as a sample and the size I wanted.
Definitely not worth doing it any other way.