Topic: Gsx-r front end conversion on a 1980 cb650c

[yev121]

Over the past few months I’ve been converting a 1980 cb650c into a cafe racer. I’m getting close to finishing it and want to put a 2005 gsx-r600 (i have a whole parts bike) front end on my project. I’ve done some research and found conversion bearings through all balls racing. My only question is would i be able to get away with just buying the bearings? Or would i have to buy a new stem as well? It’s around $180 from Cognito for a new stem and bearings and am looking for a cheaper route. Basically is there any way around buying a new stem? Or do I have to dish out the whole $180 for everything?

[754]

Anyone with a lathe that cuts metric threads, should be able to turn out a stem .
 7075 would be a good choice,  but a bit harder to source.. easy to find shorter lengths on ebay.
 If you don't have a mill you can grind the notch.

[slikwilli420]

There is nothing cheap nor easy about this conversion. You need to work out every aspect before you just jump in. For all practical reasons, a modern USD fork conversion is not necessary for a retro bike and a lot needs to be done to get it right. You may be better off to go with a GL1000 swap as its nearly bolt on and still offers far superior handling and braking vs stock components.

[540nova]

Don't forget about the front hub.

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[Jnel]

For someone who was giving this some thought over the last few months... I think I have now decided to spend my money elsewhere.

Thanks for clearing this up for me.

Jnel

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[540nova]

Don't forget about the front hub.

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Only relevant if he wants spokes. Said he had a donor bike, so I think he might be using mag wheels?

If so, that means widening the swingarm will be required,  if he wants a matching set of wheels.

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[nicks2319]

I have it done on my 550. I bolted the entire gsxr stem + triple + forks onto my frame. I wanted laced wheels so I bought the cognito conversion hub for it. Otherwise it's pretty straight forward.