Runs perfect! New top end, eliminated oil injection, One super happy kid yesterday.
The largest problem was solved with a giant bonfire, there was so much sludge in the exhaust I tossed the little muffler in a giant fire, burnt that baby but good!
I purchased a new piston and ring set for this bike, also in the set is a spring looking part that must go under the top ring, is this necessary on a freshly bored and honed cylinder.
I've actually put this mini-bike on the back burner to fiddle with a new sherco!
YZ 80! Cylinder bored, new piston rings and yet after 7 kicks the compression only reads 100lbs. The bike actually starts after a couple kicks, Idles well, but no power. The reeds looked clean to me, after 45 min of riding the plug looks half black but dry not wet at all! Also, I checked for air leaks and did not find any around the outside of motor.
So, what now? engine seals?
If a exhaust is plugged up can it effect the compression?
Mean while I have done the whole top end on my Montesa and she runs great!!!
I have a cracked Airbox right underneath where the fender attaches at the rear on the left side at the tab/ear like portion. Its actually a large gap, is there anyway I could plastic weld this back together? New air box cost 200.00+
Sounds easy enough, I'll give it a shot and thanks for letting me know about D-Kirks having gaskets. Bike bandits has been real good, downside is the location is on the west coast. I'm spoiled with companys like RYP,
Is this gear pulling of the auto pump for the oil injection easy, you say place a piece of metal to plug the hole, sounds over my head, but I'm going to tear into it today, imagine I'll need a new case cover gasket?
looked at the schematics on BikeBanditos, many parts to that little oil pump!
I will check the Flywheel for movement, but hoping its just all top end! I'm probably going to buy everything from Bikebandits, Are there any other parts people out there equal to Bike Bandits?
This bike is I'm sure a 74 YZ 80, grey tank red swoosh, the tank looks the same on the parts breakdown sheet, all the pictures are black and white though.
I can not remember how to do a compression test? 1 kick shows 25lbs-2 kicks shows 50lbs-5-10 kicks and she tops out at about 80lbs. Is this correct?
I replaced the cylinder head today, she will not start. Checked plug and it looked like there was crank case oil on it? If the compression is bad, does this mean the rings are cooked or engine seals are also a scenario?
Before I had the head repaired, she would start and Idel just fine, but give it gas and it would bog out, no power! So I sprayed brake cleaning fluid around looking for air leaks and located this huge leak around the head, could actually stall out the bike.
Lineway, I almost picked up some emory cloth thinking I could level it on my slate counter tops!
Glucosamine?
in General Trials Talk
Posted
Has anyone used Glucosamine with success? Joint maintanence.