This is my Sierra propshaft. I just removed the "doughnut" and i came with this triangle flange. Could someone suggest how i am going to connect this 3-bolt flange with the 4-bolt sprocket adaptor fitted to the motorcyce engine?
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it needs to be profesionaly adapted and balanced have a look at what happens to ones that have broken due to being out of balance its not a diy job

Hang on, I'm just popping next door to see the rest of the picture..............

..........................................back now



You need to chop off the triangle and weld a four bolt flange on.


Most recommend a specialist prop shop as it'll need balancing after.

Yes, i know that the shaft should be professionally balanced, the question is how to adapt this flange to the sprocket adaptor. Any pictures from anyone?

I would send the prop to someone like bailey morris and ask them to convert it to a four bolt flange and then balance it. Having seen 2 let go this season, both of which cut a fuel line and wrecked motors and chassis rails and one which sparked up and gutted the car i just dont think this is a diy job. Baileys will definately do it for you, they are doing one for me this week
regards
Andy

Thanks Andy, please check your U2U inbox! Thanks!

Oops - just got your U2u and noticed location so I am not sure my advice was very helpful, that said depending on budget if you want me to sort a new prop from baileys and ship it to you I will get a quote for you - would just need to know diff being used, full length, distance from sprocket adaptor to centre bearing and which prop adaptor pcd you are using.
Hope that helps
Andy

I am afraid that i must have the engine in hand to give you most of the details you are requesting. Maybe we could arrange this by making a very good discount for one of your engines?

Why not making a sprocket adaptor with the same 3-hole pattern so will need only to "adjust" the length of the prop and not making a new adaptor for the adaptor?