Hi, I got a sprocket adaptor from MK (I'm building an MK Indy with a 99 Blade engine) but when fitted it seems very loose for such an important part. The adaptor fits onto the shaft from the gearbox OK (not as snug as the original sprocket mind you) but the shaft protrudes through to the other end of the adaptor, so when I tighten up the nut holding it in it tightens against the shaft, leaving the adaptor with about 5mm of loose play.
Below hopefully is a picture showing what I mean (picture has the nut off to show the shaft sticking through).
Has anyone seen this before? This can't be normal, right? Is there a difference in the shafts/sprockets for different years of Fireblades? Do you think I have been given the wrong adaptor?
I'm gonna phone MK this afternoon, but I'd like to see do you guys have any ideas before I make a jackass out of myself!
Thanks
Ali

They should fit tight, otherwise it can cause the bolt in the middle to fail and the flange slide off (see my other post this morning about that!). My ST one came with a machined spacer / washer that went behind the adapter so that when doing up the centre retaining bolt, it pulls everything tight.

Chris

Alister,

Sorry to go off thread a bit but the gear linkage on you engine...is that an aftermarket part or part of the actual Fireblade linkage.

I machined up a piece of bar to do the same job as Chris describes except mine went underneath the fixing bolt (inside the adaptor). I'm fairly sure that the MK adaptor is made from an old sprocket with the teeth machined off and then fitted into the outer adaptor with the propshaft holes in it.

Cheers

Ben

The gear linkage is part of the MK gear linkage kit. I just stuck that on so I could pop her into gear for tightening up the sprocket nut.
Thanks for the quick replies y'all.

Alister,

having recently fitted the adaptor, we machined three of these spacers (each with a slight variance) and used the one which fitted best. If you can measure up the depth of spacer required, we may have one to suit. We fitted ours at the back of the adapter. Send a U2U with details.

As other people have said you need a spacer. I speak from experiance as I now have a dented transmission tunnel and a passenger who refuses to get back in the car.

I rang MK, and indeed you do need to use a spacer. I had one machined this afternoon, and it is a good fit now. I was also a little concerned that the adaptor wasn't as tight as the original sprocket, but wth the spacer and the nut tightened it seems a good tight fit.
The MK adaptor is made and cut from hardened steel, and doesn't use any part of the original sprocket.
JMadeley, as you say this isn't something I want to take chances with!
Thanks again for all the help guys.