was out tonight and on the way home my propshaft decided to detatch itself from the gearbox (99 r1) and ended up coming home on a recovery truck. As a result of flailing around it has damaged the threads slightly on the shaft that the adaptor sprocket goes onto, can somebody please let me know if this is a main shaft for the gearbox and would the threads be ok to be tapped and die'd and re bolted back together, thanks, mark.
Did you have a prop catcher?? Sounds like you got off VERY lightly if that's all it did!!
yes i think so, there is a large rubber mount that holds the propshaft central just inside the front of the tunnel, it is only front end of the prop that has been spinning/flailing in the engine bay, i sh*t myself when it happened, sounded horrible!!!
When you find a solution and effect a repair, use thread lock on every nut and bolt, also consider wire locking critical componants.
Might help putting your location in to see if theres other builders in your area who could help you out
<<<<<<<<<<<< poulton nr blackpool.
A prop catcher may be needed and a very good check of all the components in the drive train.
a person that would help you is AB engineering Andy Bates. he is a specialist in the bec field.
On many pictures of BEC-chassis I've seen(Including Indy R that I have) the output flange of the gearbox is not parallel to the diff flange. This
will cause vibration and stress to the gearbox/diff/flanges.
I will certainly reposition the bike engine in my chassis so it is perfectly in line with the diff.
More reading here :
UJ - linky
i cannot get my blade engine parralell to my diff....it just wont fit
quote:
Originally posted by Breaker
On many pictures of BEC-chassis I've seen(Including Indy R that I have) the output flange of the gearbox is not parallel to the diff flange. This will cause vibration and stress to the gearbox/diff/flanges.
I will certainly reposition the bike engine in my chassis so it is perfectly in line with the diff.
More reading here :
UJ - linky
quote:
Originally posted by mangogrooveworkshop
Might help putting your location in to see if theres other builders in your area who could help you out <<<<<<<<<<<< poulton nr blackpool.
A prop catcher may be needed and a very good check of all the components in the drive train.
a person that would help you is AB engineering Andy Bates. he is a specialist in the bec field.
quote:
Originally posted by ReMan
It does not need to be perpectly in line, that's why you have a UJ's
But the faces should be roughly parrallel
You dont have to have the input and output planes parallel to be able to cancel out the non-uniform velocity. You just need two joints with the same
angle on them - e.g. in the BEC application have the same angle on the sprocket adaptor joint and the centre joint.
Or just stick a rubber cush drive in there!
quote:
Originally posted by Liam
You dont have to have the input and output planes parallel to be able to cancel out the non-uniform velocity. You just need two joints with the same angle on them - e.g. in the BEC application have the same angle on the sprocket adaptor joint and the centre joint.
Given the short-comings of UJ's would it not be better to have the propshaft made up with CV joints instead? Can they be requested when having
one made up?
I only ask as I'll be needing one soon and don't like the idea of a UJ failing.
quote:
Originally posted by Breaker
quote:
Originally posted by Liam
You dont have to have the input and output planes parallel to be able to cancel out the non-uniform velocity. You just need two joints with the same angle on them - e.g. in the BEC application have the same angle on the sprocket adaptor joint and the centre joint.
I don't quite understand what you're saying. Can you post a small drawing ?
