Don't rush prepping race bikes or how to learn to love low oil pressure

[Kyler]

Well, I guess if it's a stock pickup - that's probably pretty likely combined with the oil surge from acceleration.

sounds like an oil accumulator is needed to put an 1100 in a sidecar

 

[rapidray]

Kyler, feel free to call me at 714--356-7845 if you want answers on the 1100 motors. I have over 30 of them & have built & raced them since they came out. They are a MUCH better engine than the 750 engine you currently race. Pretty bulletproof in fact! Making those 80-82, plain bearing 750 engines live is a losing battle unless you are splitting the cases to look at the bearings several times a year. I used to road race those engines also & they had a bad oiling system for high rpm use.
Ray.

 

[Kyler]

Kyler, feel free to call me at 714--356-7845 if you want answers on the 1100 motors. I have over 30 of them & have built & raced them since they came out. They are a MUCH better engine than the 750 engine you currently race. Pretty bulletproof in fact! Making those 80-82, plain bearing 750 engines live is a losing battle unless you are splitting the cases to look at the bearings several times a year. I used to road race those engines also & they had a bad oiling system for high rpm use.
Ray.

I will definitely be calling! Give me a few days as I have to get my third 750 running before Barber and I have family coming into town. I pick up a GS1100 motor early Nov and will be prepping it over the winter.

 

[Gammaboy]

sounds like an oil accumulator is needed to put an 1100 in a sidecar

If it was me, I'd get a 3/4" spacer cut to space the sump plate down (increasing capacity), baffle the heck out of the sump and rework the pickup so it pickups from the bottom of the sump - or build a swinging pickup. Or even sort of drysump it (run a scavenge pump and pick up from a couple of places in the bottom of the sump, feed a small drysump tank, run a line form tank to factory pump inlet - plumbing it would suck, but it'd be bulletproof)

 

[rapidray]

but it'd be bulletproof)

No such thing as "Bullet proof" on an 80-82 plain bearing, GS750 motor. Sorry, that is just a fact!
Ray.

 

[Gammaboy]

No such thing as "Bullet proof" on an 80-82 plain bearing, GS750 motor. Sorry, that is just a fact!
Ray.

God no - I wasn't talking about that, was talking bout the 1100!

 

[Kyler]

After an interlude of family visits, I finally got the bike unloaded.

First thing I did was a compression test (done cold carbs open). I did three each tests.
#1: 105, 105, 105
#2: 80, 65, 80
#3: 70, 90, 90
#4: 120, 120, 120

but I should have started with the filter - it is full of filings.

On to motor #3.

 

[Kyler]

my day went downhill quick. I pulled motor #3 out and started tearing it down. The mud dauber nests were bad enough but then I noticed EVERY exhaust flange bolt had been cut off. I popped the valve cover and the cams were galled too. {sigh} Looks like this season is over.

 

[rapidray]

Don't give up so quickly. If you have 3 engines you should have enough parts to make ONE good one. Call me if I can help.
Ray.

 

[Kyler]

Don't give up so quickly. If you have 3 engines you should have enough parts to make ONE good one. Call me if I can help.
Ray.

I only had one race left this season and it is more a case of put the money where I want to be next year versus sink $$ into a motor won't use again after this season. I'll be selling off carbs and other decent bits from the 3 motors to help pay for the 1100.