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Discussion Starter #1
Wanting a plug and play setup to convert my CB350K2 from 33mm to 35mm forks, I did some research on the web and picked up a couple pairs of 1972 SL350K2 triple trees from eBay. The lowers have the double pinch bolts and measure 35mm diameter. However, the uppers measure just 33mm diameter.

Is the SL350K2 upper triple clamp similar in design to the one that was originally fitted on my CB350 to capture the fork? I need to be able to adjust the front ride height by raising or lowering the forks through the triple clamps. Am I missing something? My research indicated this was a bolt on affair. Am I supposed to machine the holes in the upper clamp to fit 35mm forks?

I know some of you guys are going to say just get CB750 or CB550 clamps but I've already been down that road once and don't want to mess with swapping steering stems. Thanks.
 

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If you get an early CL one they are pressed in with an expander plug without any welding.
You only need a bar to fit inside stem, press out expander then press out stem.
I'm going to fit it to a 41mm Suzuki yoke (when I get round to grinding off the weld)


 

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Discussion Starter #5
I'm thinking that the SL350K2 forks neck down from 35mm to 33mm between the triple clamps for some reason. Apparently these tapered forks are somewhat common on off-road machines, and even some modern sport bikes. Seems I'm back to using the adjustable hand reamer....
 

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Discussion Starter #6
I'm thinking that the SL350K2 forks neck down from 35mm to 33mm between the triple clamps for some reason. Apparently these tapered forks are somewhat common on off-road machines, and even some modern sport bikes. Seems I'm back to using the adjustable hand reamer....
 
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