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Post by chewbaca on Apr 20, 2017 0:35:01 GMT -5
What does shimming your boss do for you?
It can give you back lost variation range do to flat spots on rollers or worn sliders and ramps
And it's a free mod
All you need is dial calipers, scissors, a file, sandpaper, and card stock
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Post by dav3 on Oct 18, 2017 1:28:35 GMT -5
So..... How do I do it?
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Post by chewbaca on Oct 18, 2017 11:34:58 GMT -5
Ah ok
To start with remove the entire veriator and completely disassembled it. Take a measurement of the length of the steel tube. That tube is the boss.
Then measure the thickness of the card stock
File off 090 % of the thickness of the card stock
From the end of the boss.
Cut a washer from the card stock and slide it up against the kick start gear. Slide on the boss the steal cam plate and the pulley fan. Torque the nut down and the remove it all again.
Remeasure the card stock washer as it will have been crushed thinner. Add the length of the boss and the washer together
And file the boss down until the two add up.
Hopefully it's nice and close if it's to short you can add some
writing paper. When the length is the same as the original measurement resemble the variator and install with the card stock shim next to the motor
Oh and just in case you were wondering paper under that much pressure is waterproof
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Post by tortoise on Oct 18, 2017 12:23:27 GMT -5
In the context of the 139QMB short-case (10" wheel) engine . . a slightly longer 681 belt (compared to original 669) MAY be an alternative. |
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Post by chewbaca on Oct 18, 2017 18:25:20 GMT -5
No
A longer belt drops the gear
Sort of the opposite of the effect your looking for if your trying to compensate for worn pars
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