Bel-Ray Thumper Racing Full Synthetic 4-Stroke Motor Oil

Customer Reviews for Bel-Ray Thumper Racing Full Synthetic 4-Stroke Motor Oil

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Bel-Ray Thumper Racing Full Synthetic 4-Stroke Motor Oil Reviews

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CR500 smooth

Frank in Washington

Comments On Feb 26, 2013:This oil makes shifts smoother and more positive than with the Belray Gear saver. I run 10-40 in cooler weather and 10-50 in summer. Also works great in the CR250 just use the 10-40 year round.

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I trust Bel-Ray

JEFFREY in MO

Comments On Oct 30, 2012:I've always used Bel-Ray lubricants on all my bikes since I was a kid. I've never had any trouble with them.

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works great

Frank in WA

Comments On Oct 05, 2012:Polaris outlaw 525S would not power shift using Motrex 10-50, went to this and now powershifts easy. Seems better

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1 of 1 people found this review helpful.

My bike does not like this it!

Seth A. in CO

Comments On Jun 29, 2012:Local shop was shut down and i needed to change oil, put bel ray in and rode. My bike made a lot more noise than usual, and it shifted horrible.

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1 of 1 people found this review helpful.

No problems

Robert in MI

Comments On May 30, 2012:Been running this oil in several 4 stroke machines with no problems. Doesn't seem to break down when I neglect an oil change like conventional oil did.

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0 of 1 people found this review helpful.

oil is oil?

craig in IL

Comments On Apr 30, 2012:never used it but am told its good.been running silkolene,good stuff but pricey

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2 of 2 people found this review helpful.

Worth the price

Greg in UT

Comments On Mar 30, 2012:Great stuff, I run this in my 2005 KTM 400 exc; the owner's manual calls for the tough to find, 10W 50 full synthetic oil, but this is just right for my machine.
The bottle is a little cumbersome to pour compared to other bottles, requires a funnel for most applications, but this isn't a big deal.

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