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I finally got around to checking the valves. This motor was supposed to be a low-time motor when I installed it and I was in a hurry so I didn't check it out to thoroughly. Anyway, this is NOT a low time motor! The valve adjusters are worn at a slight angle and the cam has noticeable grooves...

Here's my bike. Powered by a 1980 GS750.

Originally Posted By: sunruh does your crank sit in plain saddle bearings? nice report. wow a 10w40 that stayed in grade twice now. so, what really changed from sample 1 where it wasnt in grade? taking it easy on the motor i bet! HA HA HA! i dont know if i would change anything, but now that...

Originally Posted By: Clevy Was it MOS2. If so,and you couldn't make the clutch slip in a racing situation with mos2 in the sump then you've just taught me to concern myself far less with the whole moly/shared sump condition. And it seems even at a low enough dose that clutch was unaffected the...

I added moly as directed -- for motorcycles it is 20ml per liter of oil. There was absolutely no change in clutch behavior. Can't wait to see what the next sample reads. Unfortunately my racing season is over and that won't be until next spring.

Here's the last sample of this race season.

Oil sample #2 I'm running pump gas 87 octane with some Stabil and MMO added to the gas. This is the sample where I added LiquiMoly before the race.

Originally Posted By: rrounds Put a low oil pressure light on your bike. Get a adjustable oil pressure sender so you can have the light come on at a higher pressure, like 45 lbs that way you know to cut back on the power if the light comes on. And I would/use a bright LED light that you can see...

Originally Posted By: CATERHAM Do you have an oil pressure gauge installed? Just wondering if you're getting any oil starvation during high G cornering? Yes I do and I've not seen any low pressure. Pressure is normally at 70#. Honestly I'm looking forward and not at the gauge. I'll ask my...

Background: this motor had 14,000 miles on it before I put it in my racing sidecar. At the time of this sample, it had 6.1 hours of race time. Sample was taken cold. Motor is a 1980 GS750 (16-valve). No engine work had been done other than making and installing an external oil cooler and...

thanks - have done that

is there a way to delete my own thread? It appears that most posters ignore the fundamental question. I'm sorry I asked it.

I get the Suzuki oil at $7/qt as part of my sponsorship deal. He normally sells it at $9.95/qt.

currently I'm using Suzuki Racing Synthetic 10w-40. I was running Motorex synthetic. I switched because my dealer/sponsor gave me a better price and I change oil about every 6-8 hours (2 race weekends). I did not start doing analysis until recently so I can't give you a decent comparison.

Thanks to Trav, I found "Liqui Moly Racing Bike-Oil Additiv." The problem I was trying to mitigate is cam galling. The 1980 GS750 motorcycle motors are know for cam galling and I wasn't excited about installing extra lubrication to the head. This motor spends the vast majority of its time...

for those interested, I got some "Liqui Moly Racing Bike-Oil Additiv" and put 80ml in the motor which is slightly less than what was recommended. I raced this weekend and there was no clutch slippage whatsoever. It was brutally hot in NJ (mid 90s) and the motor ran cooler than expected. Not sure...

I apologize to the board. I was seeking advice and out-of-the-box thinking on how to prevent cam galling on my racing sidecar motor. I got the answer I needed, but didn't expect, so the board works great! Again, my apologies for starting a religious donnybrook.

so the question is cam galling and an oil additive. I think Clevy had a good point with the comment about "film strength." I spent spend some time researching LiquiMoly as Trav suggested. And what did I find? will have to seriously consider this. Thanks everybody! sorry to have started...

Originally Posted By: Clevy As far as cam galling I assume you want more film strength. I don't feel mmo will help in that regard. You want a can of mos2. Problem solved. Or use red line oil exclusively at 5000-6000 mile intervals. Yes it's gonna cost you but would you rather spend a little...

So, has anyone used MMO in a race vehicle regularly? I use MMO in my old worn out 94 Chevy truck to quiet the lifters. When the lifters get noisy and power drops off, I add MMO and all is well within 20 miles. It works [censored] good. And I won't go without it. I have a 1980 Suzuki GS750...