S40 - Resistance in first part of gear - fuel venting?

Old 06-30-2012, 09:52 PM
Junior Member
Thread Starter
Join Date: Jun 2012
Posts: 1
Default S40 - Resistance in first part of gear - fuel venting?

I had my petcock replaced recently, because of a broken diaphragm, and afterwards I changed the oil because I figured all that revving to keep it from stalling had to be pretty hard on the engine. Put in two quarts of SAE 10w-40, just like it says on the cap.

Now I'm feeling a lot of resistance in the first half of every gear, and while going up a hill something felt totally wrong.

I tried opening my fuel cap because I read something about clogged vents, and because I'm guilty of filling up to the top... that worked for a couple miles but then it started doing it again.

Any advice?
Old 07-12-2012, 12:30 AM
Junior Member
Join Date: Jul 2012
Location: Clovis, New Mexico, USA
Posts: 7

SAE 10W-40 oil is standard and should be okay, it doesn't have to be motorcycle grade oil, the standard automotive stuff is okay.

For one dcarroll, after filling the crankcase of new oil, did you check the oil level sight glass at the lower right hand of the motor? Bike should be on level ground with forks straight, bike off kick stand and perfectly upright/balanced. The oil level should be somewhere near the middle, between the 2 marks.

I am not sure what you mean by a lot of resistance. Is it the bike seems to have little power at low rev's in each gear? Or is it a mechanical feeling, like something is rubbing or a gear bearing may be failing?

Sincerely, George Hostler
Related Topics
Thread Starter
Last Post
RM-X450, RM-Z250, RM250, RM125, RM85L, RM85, RM65
06-25-2015 05:10 AM
SF Help & Suggestion Center
12-09-2009 01:00 PM
PRIVATE For Sale / Trade Classifieds
01-20-2007 05:06 PM
Suzuki Aerio SX & Aerio Sedan
10-14-2005 07:28 PM

Thread Tools
Search this Thread
Quick Reply: S40 - Resistance in first part of gear - fuel venting?

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.