Mikuni Main Jet Drill Size Chart at Brianna Fornachon blog

Mikuni Main Jet Drill Size Chart. I was in a bind over the weekend and needed to drill out a jet and found this cross referance chart and thought it might go in the tech. The most typical are the large hex style and the large round style. I have almost 4 turns out on. I replaced my stock exhaust for supertrapp exhaust. Mikuni has several different styles of main jets. We do not recommend drilling out jets as the result can be a hole that is not perpendicular, an out of round hole,. The calculations calls to upgrade the main jet from 120 to 122. In the photo to the left you can see the drill bit measures 1.19mm. 1) the upper three digit number identifies which type of needle jet it is e.g. 66 rows table of orifice hole size for mikuni, keihin and dynojet that may help when swapping carbs or jets Body (assuming it’s a genuine mikuni needle jet): For example, a 140 main jet is 1.40mm and is equal to about.055 and the largest numbered bit in the set i show is #61.039 so look for a numbered bit set with larger drills. Once you drill the main jet to a size that gives you a good plug reading you can use the chart below to determine what size the jet is. You can use the mikuni chart on the right to determine what type of jet you have. That is the only mod i have done.

Once you drill the main jet to a size that gives you a good plug reading you can use the chart below to determine what size the jet is. I replaced my stock exhaust for supertrapp exhaust. 1) the upper three digit number identifies which type of needle jet it is e.g. For example, a 140 main jet is 1.40mm and is equal to about.055 and the largest numbered bit in the set i show is #61.039 so look for a numbered bit set with larger drills. Body (assuming it’s a genuine mikuni needle jet): You can use the mikuni chart on the right to determine what type of jet you have. We do not recommend drilling out jets as the result can be a hole that is not perpendicular, an out of round hole,. The calculations calls to upgrade the main jet from 120 to 122. I was in a bind over the weekend and needed to drill out a jet and found this cross referance chart and thought it might go in the tech. I have almost 4 turns out on.

Mikuni Main Jet Size Chart

Mikuni Main Jet Drill Size Chart The most typical are the large hex style and the large round style. Mikuni has several different styles of main jets. For example, a 140 main jet is 1.40mm and is equal to about.055 and the largest numbered bit in the set i show is #61.039 so look for a numbered bit set with larger drills. That is the only mod i have done. We do not recommend drilling out jets as the result can be a hole that is not perpendicular, an out of round hole,. I have almost 4 turns out on. I was in a bind over the weekend and needed to drill out a jet and found this cross referance chart and thought it might go in the tech. Body (assuming it’s a genuine mikuni needle jet): 66 rows table of orifice hole size for mikuni, keihin and dynojet that may help when swapping carbs or jets 1) the upper three digit number identifies which type of needle jet it is e.g. The most typical are the large hex style and the large round style. In the photo to the left you can see the drill bit measures 1.19mm. Once you drill the main jet to a size that gives you a good plug reading you can use the chart below to determine what size the jet is. I replaced my stock exhaust for supertrapp exhaust. You can use the mikuni chart on the right to determine what type of jet you have. The calculations calls to upgrade the main jet from 120 to 122.