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Post by one1 on Jun 15, 2012 22:43:12 GMT -5
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Post by ososlow on Jun 15, 2012 22:57:43 GMT -5
Looks ok to me.
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Post by one1 on Jun 15, 2012 22:58:39 GMT -5
Thought it might be a tad lean because I know I get pre-det after the scoot has been running for a while.
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Post by ososlow on Jun 15, 2012 23:01:40 GMT -5
Maby a colder plug?
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Post by 90GTVert on Jun 16, 2012 7:03:26 GMT -5
Looks OK. You could try a step larger on the main and see how it does. The detonation could just be the result of a healthy 90cc with a stock carb. They run pretty hot. If you don't already have it, look into a larger cooling fan. Some have it, some don't, some won't fit it without a larger shroud. Can get one on eBay used off a Polaris 90 for around $10 a lot of times. There are temp readings and more info on the fan and larger carbs in the Project 90 thread if you're interested. While a larger carb isn't a bad idea, you don't seem to be that interested in modding, so I dunno that I'd spend $100+ on that even though it should drop temps a good bit.
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Post by one1 on Jun 16, 2012 10:42:12 GMT -5
I am interested in dropping the temps. It is my only real interest at all this moment.... though scootie is about through the useable miles where when I have to start replacing things it will be with better things since stock will be 3/4 the price anyway in most cases.
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Post by 90GTVert on Jun 16, 2012 11:10:27 GMT -5
I was just messing with a scoot and a plug looking similar to yours and running well. Went up one jet size and got similar or improved performance and a 40 degree drop in cylinder head temp. It's definitely worth spending time tuning. You may not see that difference, and you may find you're in tune well now. From past experience with Project 90 and it's CHT gauge, one jet size can definitely swing you 20-40 degrees one way or the other. That can be enough to eliminate detonation, and who knows what positive effect that could make over many miles.
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Post by jmkjr72 on Jun 16, 2012 11:49:38 GMT -5
was that 500 miles sence you replaced the plug cap
a faulty plug cap can cause bad readings on the plug
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Post by one1 on Jun 17, 2012 12:12:55 GMT -5
Good thought, but I didn't run it once it began to loosen up. I caught it as early as it could have been.
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Post by one1 on Jun 17, 2012 13:59:26 GMT -5
It is still doing better than the plug in my Ranger. These two plugs are from cyl #2 This is the third AP104 Autolite plug to fail on me in 3 months. All different issues in different cyls, but all insulator failure.     |
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