Coolster 70cc - Front Honda Fork delrin busings

[Douglass]

I have a 2017 Coolster 70cc (Honda CRF50 replica), and I would like to know if anyone has tried to install the Honda Delrin fork bushings. It looks like the inner diameter will work, but not sure about the outer diameter of the bushing. my calipers don't go up high enough for me to measure the ID of the fork tube.


https://www.50stunt.com/product_p/mmss-0138.htm

ID is .862"
OD is 1.180"

[dirtbkr188]

I measured a '98 Z50R front fork assembly I have here and came up with the following:


fork leg lower OD - 22.00mm
fork leg upper OD - 34.21mm


I then converted the bushing specs you posted above over to mm, for comparison:


bushing ID - 21.89mm
bushing OD - 29.97mm


The forks are together, that's why there is no fork tube ID

[Douglass]

I measured a '98 Z50R front fork assembly I have here and came up with the following:


fork leg lower OD - 22.00mm
fork leg upper OD - 34.21mm

Awesome! Thank you. Looks like the Coolster is pretty much spot on.


Here is what I measured.

Fork Shaft OD - 22.00mm
Fork tube OD where busing would be positioned - 34.28mm

I did a little bit more researh, and found that the I.D. of the Delrin bushing is 22mm, and the O.D is 30mm.

I took a rough measurement of the fork tube wall thickness, and it was around 2mm thick, so that would put the fork tube I.D. right around 30MM.

I'm thinking it should work

https://www.shore50s.co.nz/store/p42...XR%2FZ50_.html