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Well it was a good weekend for tuning and testing.
The temps were about -6 on saturday when I tested.
I changed everything back to stock position. Clutches and carbs. I left the 153.6 mains in and set the needles to the stock middle position with the white washer under the clip.
I then replaced the stock gearing 21/37 with 20/39 and went for a 30 mile test ride. Awesome acceleration compared to stock. I now have about 3/8 to 1/2 inch of marker left on the primary sheave. I'm satisfied with that as clutches were cool to the touch. But I went through almost a half tank of fuel. She was burbling at almost all throttle positions. I knew the gas mileage hog was back. But it never burbled before when it had the stock gearing in it. I'm thinking I removed some of the load on the engine and it is running more "freewheeling" for lack of a better term.
Sunday morning I did a piston wash check and seen the half the piston was clean. Way to much fuel. So, I raised the clip one notch to the second from the top and the white washer under the clip and reinstalled. Temps yesterday were maybe -3 to zero. The clip change cleared up most of the burbling except for WFO throttle. My fuel mileage also returned as the same 30 mile ride barely moved the fuel gauge from full.
Now I'm back to stock everything except GYT pipes and 20/39 gears which a very close to 2.0 ratio not the 1.75 that was stock.
I went back to stock so I have a baseline to work from. I will do a piston wash check tonight and see what she looks like. I'm thiinking about removing the white washer from under the clip and placing it on top of the clip. Do any of you folks remember seeing this white washer? it appears to be qiute thick. I don't want to go too lean. I'll measure it tonight, but what are my options out there for these washers? My other option is to go to a smaller main jet but don't really want to do that as that will lean ouit the engine throught the entire rpm range.
I guess I'm asking if you fellas think it's ok to change that washer to the top of the clip and try that. I think it will be ok as it was burbling at zero degrees and I won't ride if it's much colder than that. So it should be fine at any temps above 0. Also could this gear change make that much of a difference?
This is on my 600 twin btw
The temps were about -6 on saturday when I tested.
I changed everything back to stock position. Clutches and carbs. I left the 153.6 mains in and set the needles to the stock middle position with the white washer under the clip.
I then replaced the stock gearing 21/37 with 20/39 and went for a 30 mile test ride. Awesome acceleration compared to stock. I now have about 3/8 to 1/2 inch of marker left on the primary sheave. I'm satisfied with that as clutches were cool to the touch. But I went through almost a half tank of fuel. She was burbling at almost all throttle positions. I knew the gas mileage hog was back. But it never burbled before when it had the stock gearing in it. I'm thinking I removed some of the load on the engine and it is running more "freewheeling" for lack of a better term.
Sunday morning I did a piston wash check and seen the half the piston was clean. Way to much fuel. So, I raised the clip one notch to the second from the top and the white washer under the clip and reinstalled. Temps yesterday were maybe -3 to zero. The clip change cleared up most of the burbling except for WFO throttle. My fuel mileage also returned as the same 30 mile ride barely moved the fuel gauge from full.
Now I'm back to stock everything except GYT pipes and 20/39 gears which a very close to 2.0 ratio not the 1.75 that was stock.
I went back to stock so I have a baseline to work from. I will do a piston wash check tonight and see what she looks like. I'm thiinking about removing the white washer from under the clip and placing it on top of the clip. Do any of you folks remember seeing this white washer? it appears to be qiute thick. I don't want to go too lean. I'll measure it tonight, but what are my options out there for these washers? My other option is to go to a smaller main jet but don't really want to do that as that will lean ouit the engine throught the entire rpm range.
I guess I'm asking if you fellas think it's ok to change that washer to the top of the clip and try that. I think it will be ok as it was burbling at zero degrees and I won't ride if it's much colder than that. So it should be fine at any temps above 0. Also could this gear change make that much of a difference?
This is on my 600 twin btw
