Hi Guys after some advice on the following. Fitting a 3' BDL Beltdrive and a new spyke starter. The problem I have is that the jackshaft doesnt want to push into the housing on the beltdrive frame. See pics below

The hole in the holder section is 17.49mm or 0.687"

The shaft on the jackshaft is 17.09mm or 0.685"

Any ideas or advice would be much appreciated.

hi burnzi how are you  i dont no any thing about open drives but u maybe able to get a brake hone  and hone out the bush/ bearing a bit at a time to give it a bit of clearance  .

Umm that should fit as the shaft is smaller than the hole in the holder, unless you have written them down wrong. Have you checked the shaft for Burrs ect that may be stopping the shaft sliding into the holder?

Could you throw the shaft in the freezer overnight ?

Might want to double check your calcs, 17.49mm = 0.688" and 17.09=0.672" which leaves 0.016", might be an ovality issue

if it was me i would hone it ,as a guide measure your old pinion and cover and see what that has ,

if it was me i would hone it ,as a guide measure your old pinion and cover and see what that has ,

gday burnzi do you know anyone with an adjustable hand ream,by using this you will get a nice round hole,hone may not get it right as it could follow existing shape,ive got one in warrny if you feel like a drive,lol,your mate with lathe may have one as well.

If you take it to a machine shop/engine rebuilders etc they will ream it out for you,  the bush was more than likely machined to size first and the interference fit when pressed into the housing has caused it to reduce.

 

http://www.ebay.com.au/itm/Adjustable-HAND-REAMER-HSS-blades-17-19-/360338976781?pt=AU_Tool_Parts_Accessories&hash=item53e5e0700d

http://www.ebay.com.au/itm/Adjustable-Reamer-HSS-Blade-17-19mm-/270859505538?pt=LH_DefaultDomain_15&hash=item3f107c0f82

it needs honing to true it up but 0.4 to 0.5mm is a very loose tollerance