rowens
New Member
Hi everyone, I am a new builder and have just successfully completed a Skyhawk installation. Thanks for this forum, I would be lost without it, having no experience with engines and my build would likely be sitting in the garage unused due to performance issues.
Through reading posts here, I have determined this engine has four stroking- wet black plug, runs rough and jerky at all throttle positions except at WOT going up steep hills it will run smooth. I watched the YouTube four stroking video and is exactly what my engine is doing.
I have moved the needle see clip to the top groove - still four stroking. I assume the next step is to get and install a smaller carb jet but I have several questions. Please forgive my ignorance in this.
Q - what is the thread size of jet of NT carb, 5 mm or 6 mm?
Q - what size is the stock jet of the NT carb? Can I go two sizes smaller and adjust the needle depth, or is it better to downsize one step at a time, I see there are about 11 sizes from 0.78 to 0.59 available at Sick Bikes and I would rather not buy them all to try.
Any help would be appreciated - sorry if I sound like a cheapskate not wanting to buy lots of carb jets but I am a senior, and on a very tight budget. ---Rob in Port Hope, Ontario.
Through reading posts here, I have determined this engine has four stroking- wet black plug, runs rough and jerky at all throttle positions except at WOT going up steep hills it will run smooth. I watched the YouTube four stroking video and is exactly what my engine is doing.
I have moved the needle see clip to the top groove - still four stroking. I assume the next step is to get and install a smaller carb jet but I have several questions. Please forgive my ignorance in this.
Q - what is the thread size of jet of NT carb, 5 mm or 6 mm?
Q - what size is the stock jet of the NT carb? Can I go two sizes smaller and adjust the needle depth, or is it better to downsize one step at a time, I see there are about 11 sizes from 0.78 to 0.59 available at Sick Bikes and I would rather not buy them all to try.
Any help would be appreciated - sorry if I sound like a cheapskate not wanting to buy lots of carb jets but I am a senior, and on a very tight budget. ---Rob in Port Hope, Ontario.
Last edited by a moderator: