Scooter Doc Forum - Front Shock Mod ($15) and Shock Oil Replacement

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Topic: Front Shock Mod ($15) and Shock Oil Replacement (Read 1,738 times)

audionut74
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Front Shock Mod ($15) and Shock Oil Replacement
« Thread Started on Feb 3, 2011, 12:39am »

Here is a guide to modifying your front shocks on a typical Chinese 50/150cc scooter should work on many types or years of scooters (shock showed below is from a 2010 scooter)

FYI you must remove your shocks before starting this mod

parts need are

1# you need a wench to remove the top cap of your shock depending on the type of cap your shock has will determine the need wrench will be IE "Allen or socket"

2# 2 clear cups

3# 2 sockets of same and proper size for shock cap (sizing is covered below)

4# I used 1 QT 30w synthetic fork oil (but you are welcome to experiment with different weight 30,25,20,15,5 oils) any brand will do

feel free to PM me if you have any Questions about this mod

[image]

Hope this helps

Brian

« Last Edit: Nov 9, 2011, 6:48am by Bashan »

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2010 GMW V-150
2011 Ktm 990 SMR

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Luke ☎
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Re: $15 front shock mod
« Reply #1 on Feb 3, 2011, 10:48am »

...you made it so easy and simple...good post!

hey,audionut,,is it not adviceable to take all apart to see if the inner pistons are still ok or has no scratch? and if the bushings and O-rings are still tight?...maybe that'll be a better idea huh?...but honestly what you did was great...now i'm thinking of changing my fork oil this weekend..thanks bud!

« Last Edit: Nov 9, 2011, 6:46am by Bashan »

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Hammerspur
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Re: $15 front shock mod
« Reply #2 on Feb 3, 2011, 12:10pm »

Good step-by-step on the oil measurements, etc.

Not sure about the 30w fork oil selection, really depends on what OEM viscosity was. More than a grade or two heavier fluid would probably yield very harsh action.

You can use stacked washers or varying lengths of PVC tube for infinitely adjustable spring preload spacers.
Heck, my apx. 700 lb. Vulcan has PVC spacers in the 1" lowered front end with 35,000 mi. on them.

« Last Edit: Feb 3, 2011, 12:21pm by Hammerspur »

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'07 E-Ton Beamer R4 150cc
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'96 Honda VFR750

audionut74
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Re: $15 front shock mod
« Reply #3 on Feb 3, 2011, 12:58pm »

Feb 3, 2011, 10:48am, Luke ☎ wrote:

yeah, i agree...you made it so easy and simple...good post!

hey,audionut,,is it not adviceable to take all apart to see if the inner pistons are still ok or has no scratch? and if the bushings and O-rings are still tight?...maybe that'll be a better idea huh?...but honestly what you did was great...now i'm thinking of changing my fork oil this weekend..thanks bud!

true that would be advisable if your scoot has hi miles, but this was done on a brand new bike so seal checks were not needed although I am glad I redid the factory fork oil it had a bunch of very very small metal particles in the oil almost looked like glitter in the oil

if the seals were bad it mite just be easyer in a worst case you could just buy factory replacement complete shocks I bought one to use as a sample for painting it was like $40 for a complete new shock so its not that expensive as an option

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2011 Ktm 990 SMR

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audionut74
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Re: $15 front shock mod
« Reply #4 on Feb 3, 2011, 1:47pm »

Feb 3, 2011, 12:10pm, Hammerspur wrote:

Good step-by-step on the oil measurements, etc.

the reason I went with 30w oil was the factory shock is so poorly designed as far any semblance of precision found in these Chinese scooter shock units its certainly not a WP or ohlins shock...lol if that was the case I would 100% agree with you but these shocks will give you a lot of wiggle room as far as oil viscosity goes and 30w seems to slow them down just enough to make them work much better " IMO" but by all means experiment with different oil weights as not all scooters will have the same results with the 30w oil but I think its a good start for my setup

now for spacers you could easily use washers but I wanted any easy and quick way to significantly stiffen the front pre load of the front shock thats why I use a socket to accomplish this + its easy to find one at any tool store and it seems to work very will for this scooter

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