Need help for my Sprint 50 oil in air filter problem
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2019 Sprint 50
Joined: 08 Aug 2020
Posts: 2
Location: Langley BC
Sat Mar 13, 2021 6:45 pm quote
Hi all,

I have a 2019 Sprint 50 with the Polini 70cc,Malossi Variator and muffler upgrades,since doing the Variator and muffler,Iíve been getting oil in the air filter box.....

Any suggestions?
2010 S50 Modified "Punkin"; 2003 ET4 Malossi 187 "ISO"
Joined: 18 Feb 2017
Posts: 730
Location: Deepinnaharta, Texas
Sat Mar 13, 2021 6:54 pm quote

A little oil is normal. There's a clear urethane bulb with a clamp to indicate when there's too much. Pull the cover and air filter and clean it out with a rag and a bit of solvent. Might as well replace the air filter element while it's out.

Then check your oil level. Excessive blow back is almost always the result of overfilling the crankcase. If it's nominal, perform a compression check on the Malossi cylinder.
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