I am back around sleds for the first time in many years and have a couple questions about this sled.
We were running into some issues with it running a little rough over the weekend at times then it seemed to clear up on it's own. It has a Boondocker control box on it along with a Racepack Avenger 3 to monitor temperatures. The sled was being used at about 5000 - 6000 feet in about 35-40 degree temperatures primarily just trail riding.
I was noticing it losing power last time out a week back at the end of the ride when I was trying to climb hills after running fine earlier. It was intermittently losing power and stalling out a bit this past Saturday and the same for part of the day Sunday. I was not on it much myself (the kids put me on the 380f and took the 600 and 1000 SDI's) but it did lose power the first time I was on it going down the trail. It finally stalled out when I stopped. It would not restart and run so I unhooked the control box. The sled started but only seemed to rev out to 6000 RPM and would not run properly with any more throttle than that. I re-hooked up the control box and it would not want to restart for a half dozen pulls then suddenly start up and run fine throughout the throttle range for a few minutes. Same thing would happen again then about after a half hour of doing that same thin several times over it ran absolutely fine for the last few hours of the day with the incredible power that it seems to have.
The exhaust temperature on the one side that was working (the other quit last time out) was around 1300 degrees on the trail at mid throttle. I will try to track down what is wrong there too.
I have no idea what exhaust temperatures I should be looking for on this sled?
Also not sure what the control box setting should be set at for a safe baseline to adjust from for a Summit? I have seen numbers for the same motor in a Mach Z and am unsure if they are the same for a Summit that is used between 5000 and 8000 feet in elevation. I assume not, but am not sure at all myself.
From my limited knowledge the plugs look fine but are a different number than what I have seen listed here and both sets in the sled were BR8ECS's. The mag side to the right in this picture has a little more carbon on it but they were not entirely clean when I put them in as they were changed on the trail when the sled stalled mid day. In comparison to other pictures I have seen the plugs look about right in terms of color and I do know that the sled has been running a little more oil lately, likely close to 30:1 (Injection ~ 40:1(last tank) and 100:1 in the fuel). Maybe that is part of my problem?
We have been only using 94 Octane fuel without ethanol in our sleds.
The sled has a stock pipe but has a pretty loud can in place of the factory muffler. Other than that I think the engine may be stock but has been rebuilt at least once (top and bottom) based upon the appearance at the gasket lines in it's 2500 miles. It has definitely been clutched and geared for the mountains.
We have been running this sled very lightly until I get a better idea of what I should be looking for.
Any advice on exhaust temperatures to look for or baseline settings for that controller would be appreciated.
Edited by ReswesT101, 07 April 2021 - 08:05 PM.