need help on jetting start point.

guen84 · Post by **guen84** » Wed May 30, 2012 11:03 pm

Have a 44.1 mini stroked 50mm PG bore, PG Long, and 28 mm OKO Carb. (Builds in signature)I'm looking for a start point with my jetting. I was way over jetted trying to cool my high compression now, I have no clue what sizes to order. I have pilots 50-60 and mains 145-158. Thanks

bakaracer · Post by **bakaracer** » Wed May 30, 2012 11:26 pm

55 pilot 140 main air fuel screw 2 turns out needle clip middle. try it with the 145 you got and see if thats to rich first.

guen84 · Post by **guen84** » Thu May 31, 2012 7:38 am

bakaracer wrote:55 pilot 140 main air fuel screw 2 turns out needle clip middle. try it with the 145 you got and see if thats to rich first.

I'm running 145 now its to rich from 1/2 throttle to full throttle ther really isn't any speed gain and my rpms are maxing out 8k. but if I'm cruzing in 1/4 to 1/2 throttle range temps get up in the 360's

Trafficjamz · Post by **Trafficjamz** » Thu May 31, 2012 7:53 am

360 is good right?

guen84 · Post by **guen84** » Thu May 31, 2012 1:18 pm

[quot e="Trafficjamz"]360 is good right?

[/quote]

I should have clarified 360 and still climbing I pull over and idle back down

Trafficjamz · Post by **Trafficjamz** » Thu May 31, 2012 10:43 pm

guen84 wrote:
Trafficjamz wrote:360 is good right?
I should have clarified 360 and still climbing I pull over and idle back down

What is your compression at?

guen84 · Post by **guen84** » Fri Jun 01, 2012 10:31 pm

Trafficjamz wrote:
guen84 wrote:
Trafficjamz wrote:360 is good right?
I should have clarified 360 and still climbing I pull over and idle back down

What is your compression at?

125 got a PG kit from VT made for mini stroke this piston was way shorter than any other kit I've had...

bakaracer · Post by **bakaracer** » Sat Jun 02, 2012 1:37 am

check for a air leak and make sure the compression is 125. use the kick lever and not the electric start to check that. also make sure your not using a long hose and a adapter for the compression tester. it adds volume to the head so compression readings will be lower

guen84 · Post by **guen84** » Sat Jun 02, 2012 2:31 am

bakaracer wrote:check for a air leak and make sure the compression is 125. use the kick lever and not the electric start to check that. also make sure your not using a long hose and a adapter for the compression tester. it adds volume to the head so compression readings will be lower

not this time ive already blown up 3 cylinders this is solid, i can tell compression is down and no air leaks. last build pilot was 58 pilot and main was 160...

Trafficjamz · Post by **Trafficjamz** » Sat Jun 02, 2012 2:53 am

what pipe?

Madman · Post by **Madman** » Sat Jun 02, 2012 3:20 am

bakaracer wrote:check for a air leak and make sure the compression is 125. use the kick lever and not the electric start to check that. also make sure your not using a long hose and a adapter for the compression tester. it adds volume to the head so compression readings will be lower

How many psi do you think the hose and adaptor adds?

veedubh20 · Post by **veedubh20** » Sat Jun 02, 2012 3:59 am

the is no information about the crank case port or untouch porting...

that is the reason why you went blow up 3 cylinders...

crankcase need to clean out real good.

any metal shaving lay on the bottom crank case... from seize bore. any metal shaving damage crank, crank bearings...

guen84 · Post by **guen84** » Sat Jun 02, 2012 10:12 am

Trafficjamz wrote:what pipe?

PG Long

guen84 · Post by **guen84** » Sat Jun 02, 2012 10:30 am

veedubh20 wrote:the is no information about the crank case port or untouch porting...
case is cut to match

that is the reason why you went blow up 3 cylinders...

crankcase need to clean out real good.

any metal shaving lay on the bottom crank case... from seize bore. any metal shaving damage crank, crank bearings... after each time case has been split, cleaned, and new bearings

kit 1 was compression, kit 2 compression (turned out the gauge was bad), kit 3 air leak from exhaust flange

Trafficjamz · Post by **Trafficjamz** » Sat Jun 02, 2012 12:42 pm

Madman wrote:
bakaracer wrote:check for a air leak and make sure the compression is 125. use the kick lever and not the electric start to check that. also make sure your not using a long hose and a adapter for the compression tester. it adds volume to the head so compression readings will be lower

How many psi do you think the hose and adaptor adds?

Adds negative 10lbs or so

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