SRPM
Member
Hi all I'm new to the forum and hobby. Got the kit on the bike and all dialed in, got the engine all broke in and everything and now I would like to get the engine dialed in just right because I plan on riding it to work. I have the Raw racer 66/88cc engine from gasbike.net (horrible webite) with an improved NT carb. Without the cnc high compression head so stock head.I'm running a 32:1 mixture with some supertech 2 stroke oil form wally world can't find the good stuff and premium gas (92 octane) with a E3.10 spark plug with a gap of about .25
"Engine Symptoms"
So when I'm accelerating up to about 15 to 20mph the engine seems to 4stroke (or maybe bogging) until I get up to that speed and will have to pedal to help it get there most of the time but not always, once it hits that speed it seems to gain power but 4strokes on and off up to top speed about 30 where it 4strokes out which to my understanding is normal. When climbing a hill it will have a nice crisp 2stroke sound for a few seconds then it'll 4stroke for a second or two then back to crisp sounding 2stroke then 4stroking and so on all while slowly flossing speed and this hill is nice gradual hill wouldn't be to hard to pedal up. Or is this just normal for these engines.
So I've played with every clip setting without much improvment. So I got a set of jets #60 to #80. But I have ran into a brick wall. I can't find what the stock jet size is does anyone know on these engines engines/ carbs. I tried measuring it with a tooth pick but jamming it into the hole until it left this sort of lip then compared it to the ones in the set and it seems like it a #68 so I put in a #66 to see if that would help it seemed to a little bit not over noticeable. Seems to run even better when the weather got colder and was about to rain. Also the plug seems to be showing that it is running lean with the #66 spark plug is like a dark gray color and the black carbon on the edge of the plug around the spark plug hole is turning white. I'm super paranoid about running it lean when it has to replace my car for a while. So is there any way to measure jets without buying something so I can know where to start on the jets. Am I just unexperienced and don't need to do anything to the engine. Wrong spark plug maybe or something. Also what would!be a good NGK plug for temps in the 80s to 100s. Anything helps.
Thanks,
Ssmuel
"Engine Symptoms"
So when I'm accelerating up to about 15 to 20mph the engine seems to 4stroke (or maybe bogging) until I get up to that speed and will have to pedal to help it get there most of the time but not always, once it hits that speed it seems to gain power but 4strokes on and off up to top speed about 30 where it 4strokes out which to my understanding is normal. When climbing a hill it will have a nice crisp 2stroke sound for a few seconds then it'll 4stroke for a second or two then back to crisp sounding 2stroke then 4stroking and so on all while slowly flossing speed and this hill is nice gradual hill wouldn't be to hard to pedal up. Or is this just normal for these engines.
So I've played with every clip setting without much improvment. So I got a set of jets #60 to #80. But I have ran into a brick wall. I can't find what the stock jet size is does anyone know on these engines engines/ carbs. I tried measuring it with a tooth pick but jamming it into the hole until it left this sort of lip then compared it to the ones in the set and it seems like it a #68 so I put in a #66 to see if that would help it seemed to a little bit not over noticeable. Seems to run even better when the weather got colder and was about to rain. Also the plug seems to be showing that it is running lean with the #66 spark plug is like a dark gray color and the black carbon on the edge of the plug around the spark plug hole is turning white. I'm super paranoid about running it lean when it has to replace my car for a while. So is there any way to measure jets without buying something so I can know where to start on the jets. Am I just unexperienced and don't need to do anything to the engine. Wrong spark plug maybe or something. Also what would!be a good NGK plug for temps in the 80s to 100s. Anything helps.
Thanks,
Ssmuel