Need help servicing front end

Oddball Matt · 07-02-2021, 08:16 AM

My neighbor bought a maxi-scooter in a bit of a state and we're now trying to get it back to roadworthy but we can't find any info about it whatsoever. All we know is, it is a 2008-2009-ish Jonway YY250 (supposedly a honda copy)

We're currently into swapping out sweaty front shock seals but cannot find anything about what weigh oil we should be putting into the shocks and how much. I have the fill syringe thingy so mm from the top would be an acceptable value if someone would possess this knowledge, or have an educated guess to toss onto the table as currently we don't have much. Even measuring the old oil had little info to be gained as the shocks seemingly have leaked for some time now as there wasn't much oil inside to be measured, most definitely not enough.

franque · 07-02-2021, 10:23 AM

I'd see where 1/3-1/4 from the top would get you, they need some air gap to function, but not a crazy amount. If it needs to be stiffer, slowly increase the amount. I'd start with 5w oil, too.

Oddball Matt · 07-02-2021, 01:43 PM

Scratch that upon closer examination the cup part that's holding the seals have badly corroded on both shocks and a new pair was 82€ from Poland so gonna scrap these.

07-02-2021, 08:16 AM	#1
Oddball Matt Join Date: Jan 2020 Location: Vääksy, Finland Posts: 401	Need help servicing front end My neighbor bought a maxi-scooter in a bit of a state and we're now trying to get it back to roadworthy but we can't find any info about it whatsoever. All we know is, it is a 2008-2009-ish Jonway YY250 (supposedly a honda copy) We're currently into swapping out sweaty front shock seals but cannot find anything about what weigh oil we should be putting into the shocks and how much. I have the fill syringe thingy so mm from the top would be an acceptable value if someone would possess this knowledge, or have an educated guess to toss onto the table as currently we don't have much. Even measuring the old oil had little info to be gained as the shocks seemingly have leaked for some time now as there wasn't much oil inside to be measured, most definitely not enough. __________________ 2004 Longjia Grido 50 scooter 1999 Cagiva Mito 125 Evo, Yamaha XV125 engine, Ducati SS fairings, getting turboed 1993 Yamaha GTS 1000 Ex:Bashan BS200-S7 `07 Streetfighter-quad
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07-02-2021, 01:43 PM	#3
Oddball Matt Join Date: Jan 2020 Location: Vääksy, Finland Posts: 401	Scratch that upon closer examination the cup part that's holding the seals have badly corroded on both shocks and a new pair was 82€ from Poland so gonna scrap these. __________________ 2004 Longjia Grido 50 scooter 1999 Cagiva Mito 125 Evo, Yamaha XV125 engine, Ducati SS fairings, getting turboed 1993 Yamaha GTS 1000 Ex:Bashan BS200-S7 `07 Streetfighter-quad
	1

07-02-2021, 10:23 AM	#2
franque Join Date: Nov 2017 Location: Marseille, France -> Conakry, Guinea Posts: 1,481	I'd see where 1/3-1/4 from the top would get you, they need some air gap to function, but not a crazy amount. If it needs to be stiffer, slowly increase the amount. I'd start with 5w oil, too.
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