Uf21 Posted July 24, 2013 Author Report Share Posted July 24, 2013 no-one is going to dignify that question with an answer, when you where at school..did you fail lunch? What's wrong with the question? I'm trying to diagnose a problem. Maybe with low compression it's hard to start even when the engine is warm. Maybe not. Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted July 24, 2013 Report Share Posted July 24, 2013 Just a question. If it is low compression is it hard to start when the engine is warm and cold? You need to just go ahead and check compression. If it's low they will normally start easier once warmed up. If you're down near 100 pounds of compression it's time for a rebuild. Quote Link to comment Share on other sites More sharing options...
Uf21 Posted July 24, 2013 Author Report Share Posted July 24, 2013 You need to just go ahead and check compression. If it's low they will normally start easier once warmed up. If you're down near 100 pounds of compression it's time for a rebuild. Thanks all I wanted to know. I bought a compression tester on ebay and waiting for it to come. Quote Link to comment Share on other sites More sharing options...
Uf21 Posted July 25, 2013 Author Report Share Posted July 25, 2013 OK so I checked compression. It's shows 110 on both sides. I tested it twice. I also tested it on a friends bike, his bike starts fist or 2nd kick and he's also reads 110 on each side. Quote Link to comment Share on other sites More sharing options...
Young Guns Racing Posted July 31, 2013 Report Share Posted July 31, 2013 Now its time.for a leakdown. An air leak will certainly give you head aches likewhat you are experiencing Quote Link to comment Share on other sites More sharing options...
Uf21 Posted July 31, 2013 Author Report Share Posted July 31, 2013 Now its time.for a leakdown. An air leak will certainly give you head aches likewhat you are experiencing Does any sponsor sell leakdown testers? Also if there was a leak it wouldnt be reading 110 psi would it? Quote Link to comment Share on other sites More sharing options...
noonansar Posted August 1, 2013 Report Share Posted August 1, 2013 It would be hard to start if jetting was lean. An air leak would mimic lean jetting. Clean the carbs and do a leakdown. I built my leakdown tester for around $25 and got everything at home depot. It is all built from pvc pipe and 2 rubber cabs to seal the exhaust ports. I am pretty sure there is a thread here on how to do it, but it is super easy. Quote Link to comment Share on other sites More sharing options...
Starwriter Posted August 1, 2013 Report Share Posted August 1, 2013 Let me put it in a way that you should be able to understand. When you take a hit off your bong, if you don't put your thumb over the clear hole, you have a giant air leak and you aren't going to suck in very much smoke and you're not going to get stoned. It's the same thing with a 2 stroke. If you have an air leak because of cracked intake boots, leaking reed gaskets, or leaking base gaskets, you're sucking in straight air, instead of air mixed with fuel and OIL, and your motor will turn into a brick. 3 Quote Link to comment Share on other sites More sharing options...
hoppedupandcutdown Posted August 1, 2013 Report Share Posted August 1, 2013 awesome dude, really Quote Link to comment Share on other sites More sharing options...
Uf21 Posted August 1, 2013 Author Report Share Posted August 1, 2013 That's a good way to explain it starwriter. I went to my local hardware store, they don't even have rubber plugs. I'd rather buy one that's already made. Quote Link to comment Share on other sites More sharing options...
Colby Posted August 1, 2013 Report Share Posted August 1, 2013 just go up to a 30 on your pilots .. geesh ..... Quote Link to comment Share on other sites More sharing options...
Chris327 Posted August 1, 2013 Report Share Posted August 1, 2013 Let me put it in a way that you should be able to understand. When you take a hit off your bong, if you don't put your thumb over the clear hole, you have a giant air leak and you aren't going to suck in very much smoke and you're not going to get stoned. It's the same thing with a 2 stroke. If you have an air leak because of cracked intake boots, leaking reed gaskets, or leaking base gaskets, you're sucking in straight air, instead of air mixed with fuel and OIL, and your motor will turn into a brick. couldn't have said it better myself Quote Link to comment Share on other sites More sharing options...
Uf21 Posted August 1, 2013 Author Report Share Posted August 1, 2013 just go up to a 30 on your pilots .. geesh ..... Why just go up to 30? Quote Link to comment Share on other sites More sharing options...
dirtydownunder Posted August 1, 2013 Report Share Posted August 1, 2013 leak down tester is easy, just use your stock bumper ends to seal off the exhaust flanges with hose clamps. go to the hardware store, buy some pvc pipe and cap ends to suit the pipe (measure your carb flange to find correct size pipe to slide into manifold) go to a tyre joint ask for a rim valve, they will prolly give it to you. get a 3/8 barb to stick into one of the cap ends, and on the other cap end glue/thread the rim valve into it. glue the cap ends to the pipes. then all you need a low pressure gauge, to join to the barb. and use a bike pump to pump air into the motor to 6psi. make sure that fucker holds 6psi over 6 minutes. like this Quote Link to comment Share on other sites More sharing options...
Uf21 Posted August 1, 2013 Author Report Share Posted August 1, 2013 leak down tester is easy, just use your stock bumper ends to seal off the exhaust flanges with hose clamps. go to the hardware store, buy some pvc pipe and cap ends to suit the pipe (measure your carb flange to find correct size pipe to slide into manifold) go to a tyre joint ask for a rim valve, they will prolly give it to you. get a 3/8 barb to stick into one of the cap ends, and on the other cap end glue/thread the rim valve into it. glue the cap ends to the pipes. then all you need a low pressure gauge, to join to the barb. and use a bike pump to pump air into the motor to 6psi. make sure that fucker holds 6psi over 6 minutes. I went to bunnings for a low pressure gauge and they dont have it, if they dont have it I dont know where else to look since that is the biggest hardware store. Quote Link to comment Share on other sites More sharing options...
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