KozyHeat Posted December 7, 2012 Author Report Share Posted December 7, 2012 pshh! Way overrated, you think they did them back in 1989! I need new spark plugs. The backfiring moved to the left side when I swapped plugs this time. BOGUS I hate wasting spark plugs like that - I need to try one of them fancy sandblasters. I gotta measure my exhaust and intake, go get a schrader valve, some pvc, and either a gas pressure tester thing or I was THINKING my bicycle pump would possibly work. The bicycle pump clamps on and has a gauge on it. Oah yeah, my right carburetor screw cap holder screw stripped off today!!!! I wasn't even torquing it on hard! Pissed me off. The left side is missing, and the right side is stripped now. I don't even think you could fit a tap in there beacuse it would bottom out so quick. Quote Link to comment Share on other sites More sharing options...
KozyHeat Posted December 7, 2012 Author Report Share Posted December 7, 2012 Sorry - didn't see your response ( bookmark set at page 5 ) I kick it probably 5 times or whenever the needle stops moving up significantly. I forgot to do WOT the first time today and it gave me the same number, maybe even higher than when I did WOT. When I did the compression check after I put the top end together - I had no carbs and no Exhaust, so when I did it this time, I had exhaust and Carbs. Not sure if that matters though. I had a warm-ish motor ( its so cold out it cools off quickly. Probably thermosiphons itself to death in the wind) Quote Link to comment Share on other sites More sharing options...
fat_tony Posted December 7, 2012 Report Share Posted December 7, 2012 ya WOT is a must if carbs are on it ....makes a difference and sounds like your plug wires are suspect at this point Quote Link to comment Share on other sites More sharing options...
KozyHeat Posted December 7, 2012 Author Report Share Posted December 7, 2012 Yeah, I will find a set of 2 non-resistor caps, and run resistor plugs. I am trying to think of a machine I can rob them but all the other stuff is content or single cylinder that I would steal it from. Maybe I should just trim back some of the insulation, install a ring terminal and put a nut on the threads on top of the plugs. I hear you can install the slides incorrectly as well. I got to go look through the airbox and see if they are backwards Quote Link to comment Share on other sites More sharing options...
KozyHeat Posted December 7, 2012 Author Report Share Posted December 7, 2012 I checked my slides and they are fine. Quote Link to comment Share on other sites More sharing options...
KozyHeat Posted December 7, 2012 Author Report Share Posted December 7, 2012 ^Oah yeah .. I tried a known good coil and It didn't fix my problem. Quote Link to comment Share on other sites More sharing options...
KozyHeat Posted December 8, 2012 Author Report Share Posted December 8, 2012 Noob, today I was going to try the new plugs ... I had somebody pick some plugs up while they were in town -- I told them the wrong plug zzzz Ordered some parts last night. Quote Link to comment Share on other sites More sharing options...
KozyHeat Posted December 10, 2012 Author Report Share Posted December 10, 2012 Okay with a Cometic gasket set and my prolite pistons My squish is greater than .062 " !!! Could that be a problem? I don't even have solder large enough to find the exact thickness. I just bend a 90degree piece and stick it in till I hit the wall, then rotate the flywheel by hand. That would be why my compression is low isn't it. So I need to measure my squish, remove the head, and have it decked? Do the pro-lite pistons wrist pin locations move or are the domes lower ? what gives? Quote Link to comment Share on other sites More sharing options...
KozyHeat Posted December 10, 2012 Author Report Share Posted December 10, 2012 with my engine #, how can I tell what year my motor is !? According to a post on the second page here .060 - .070" is 'reasonable' Maybe its not my problem Quote Link to comment Share on other sites More sharing options...
KozyHeat Posted December 11, 2012 Author Report Share Posted December 11, 2012 New NGK Resistor 90° plug ends, new b8es plugs, below freezing temperatures. Still low end bog, but it flew ;P Its still broken I think though. I'll check the plug after it cools off. Quote Link to comment Share on other sites More sharing options...
KozyHeat Posted January 6, 2013 Author Report Share Posted January 6, 2013 Does anyone have a photo of the collar ( part #9 http://yamahasportsplaza.com/oemparts/a/yam/50038969f870021f60a0a12c/front-master-cylinder ) and where it goes ? it seems like it must stop the brake from slipping but I don't know where to put it. Quote Link to comment Share on other sites More sharing options...
Starwriter Posted January 6, 2013 Report Share Posted January 6, 2013 It's just a plastic spacer to locate the master cylinder where Yamaha wants you to put it. You don't need it. Throw it away. Quote Link to comment Share on other sites More sharing options...
KozyHeat Posted January 8, 2013 Author Report Share Posted January 8, 2013 Okay I should throw up a picture of the bars. They shot alright though my spray can was dying - Maybe not as durable as I would have hoped but we'll see. They barely fit in the oven Still need to get a new bar pad Still need to make my cdi relocator in the front and harness. Got to throw my carbies back on with my new needle + mainjets for the cold weather! Quote Link to comment Share on other sites More sharing options...
KozyHeat Posted January 16, 2013 Author Report Share Posted January 16, 2013 Spark plug worked its way loose on the left cylinder, air leak, Blown up I guess that means you should always check them and torque them properly. Clearly my fault on this one. Performance difference was hardly noticable. I have a 240 jet and its a warm day so I thought It was four-stroking like I wanted it to. I don't think there is any chance I was detonating or pinging to force the plug loose. I went too far to forget to turn the fuel on I think, I had it on reserve and just added a gallon. 40:1 cheap oil 91 octane. I suck at tuning eah Don't know what I'm going to do Quote Link to comment Share on other sites More sharing options...
Starwriter Posted January 17, 2013 Report Share Posted January 17, 2013 Blown up Don't know what I'm going to do A leakdown test? Oh yeah, you think a leakdown test is overrated. Quote Link to comment Share on other sites More sharing options...
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