General > Riding Tips & Tricks

Modern Axle Blocks for the k5

(1/3) > >>

Hillclimb#42:
I had an idea for Jfab or Larry Wiechman, or maybe BDI, but my calipers are sucking. I need a new set, or somethin, they won't calibrate right. Maybe one of you guys with a 500, a newer bike and a good micrometer can help us all out...

 On modern bikes like Ktm's and Cr's that we have the axle block is designed to go on two ways. This is so you can change two teeth on the rear sprocket and never change the adjuster bolts. This is very handy because when you are out riding or racing and you want to change gearing, alot of times you don't or can't because it will take too long. The block where the adjuster bolt hits it has two different spec.s out of center. What we need is the difference from center that the sides are, and the overall.  The newer bikes may have different vertical measurements because of varying swing arm designs, but the 520 chain is the same, and going off of the stock block specs and adding the offset for the new style blocks, should be an easy item to add to their arsenal of custom KX items. They work very nicely on the newer bikes, would love to have them on the 500. Anyone know what I'm rambling about?

maddoggy:

you're saying that you want a custom axle adjustment block with different measurments to center of hole on each side so it can be flipped for different gearing with little to no adjustment needed at the bolt? sounds like a pretty easy item to fab up. i am going to make new blocks for my bike when i finally get my casy cut off my arm. maybe i'll look at trying your idea and see if they work out. my original plan was to make a new left side block and incorporate the flag holder base into it similar to the one BDI posted up a couple years ago. pirate at work here! :-D
                                                                                                                                                       Maddoggy

Hillclimb#42:
Yeah they are nice on the other bikes. We have a 02 cr250 and the 03 ktm 105 with the same design., except the 105 has 428 chain. They have aftermarket ones out for various bikes, but none that I'm aware of for 500's. Yeah, there's no changing the adjustment, Maddoggy. You still have to pull the axle of course, but that can be out for just a second, flip over your blocks, tighten everything, and you're done. Never even break the lock nuts loose and look at your adjustment range. You can plan on a gearing swap that works, that way too. Sometimes the ideal gear requires breaking the chain or adding a link, which gets into your fun time.

here's a pic of the 105 blocks. Its the only pic I have of one. It has a 49 on it. I can put a 47 on it with how the block is set-up. See how the offset is?

ktmdude:
I have them on the 09 300, but I don't have calipers. Would a good measurement from a tape (in inches) help? Probably not. Pm me if I can help.

maddoggy:
hillclimb, i see what you're going for with that. i am going to order some new gearing for my bike, i run 15/50 now and want to go to 14/47 for different riding. when i get my wrist back to 100% i will be working on the new blocks. i'll be sure to post up the pics when finished.

Navigation

[0] Message Index

[#] Next page