i have a 2012 switchback assault. i put bikeman head pipe timing key and the tied kit as well. with all of this done i was no faster or slower than a stock sled. my tps is dialed right in and BMP sugested taking out the timeing key cause i would hit the det sensor the odd time. so tonight i pulled the timing key and i cant make it 100 feet with out hitting the det sensor im hitting it anywhere between half and full thorttle. i have also tried my ethanol chip both ways. any ideas out there?
DET
- Thread starter assault66
- Start date
I know I told you this before ,but try adding some race gas or av gas and see if that works. If it does not you will know it is the det sensor. Sometimes if the det sensor is torqued incorrectly it will malfunction. Taking the timing key out of your combination should have worked. Good luck keep us posted.
S
More Octane needed
I put on 2 SLP's stage 3's. That is head, reeds, full exhaust, and PCV. Both sleds hit the DEto on the display all the time. I called SLP they said to run Lucas Octane boost. I bought some but on the bottle it said not for two strokes so I put in some 108 race fuel. 1 gallon of race and 10 gallons of 91 and have not had a single issue. Try raising your octane rating and see what happens. I ride from 8 to 11K.
I put on 2 SLP's stage 3's. That is head, reeds, full exhaust, and PCV. Both sleds hit the DEto on the display all the time. I called SLP they said to run Lucas Octane boost. I bought some but on the bottle it said not for two strokes so I put in some 108 race fuel. 1 gallon of race and 10 gallons of 91 and have not had a single issue. Try raising your octane rating and see what happens. I ride from 8 to 11K.
i have tried running both plugs and it still detonates. i dont want have to run race gas and i was also told that i can run 91 octane with out a problem. ill mess around with it tommorow and let u guys now whats up. i have mixed a little octane boost in but that has made no difference.
R
The combustion chamber(head) design on these engines is critical.. I have been working on this all season. It is very sensitive..
Be careful what you install on this engine.. Lots of money you can spend for little to no gains and possible engine failure..
Be careful
Be careful what you install on this engine.. Lots of money you can spend for little to no gains and possible engine failure..
Be careful
T
What are you running for weights? Go to some sort of heel heavy weights. They over rev in the mid bad. Ran into that when I put my head on. from 0-3000' I
m running 71 gram slp mtx weights with 2 gram rivets in both the the center and the tip. Total 75grams Pulls hard all the way through and zero det since going with that much weight.
m running 71 gram slp mtx weights with 2 gram rivets in both the the center and the tip. Total 75grams Pulls hard all the way through and zero det since going with that much weight.
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agree with above!
try throwing alittle more wheight at it.
Mine was hitting rev limeter, when smacking it to full throttle.
added wheight no more light !
try throwing alittle more wheight at it.
Mine was hitting rev limeter, when smacking it to full throttle.
added wheight no more light !
T
Oh that sucks!!! Did you lose a lower rod bearing as others have been doing?
Or was it just from det?
Or was it just from det?
Pro 8hundies are going to start seeing a lot of ring issues. Mark my words.
I donno what it's from but the top of the pto side piston had a little piece of metal bouncing around on it. I donno if it's from the tip of a plug breaking off or somethin I dropped in the airbox but either way. Ooops haha. Looks like I'm stuck on my stalker till next week!
Check your rings if you have the time and money. Could have been a piece of a ring.
so what do you know that the rest of us don't?
That is detonation and it will look like you took a punch and hammered little dents in the top of the piston all the way around the outside in the squish band area. I learned this long ago with plenty of pistons to prove it. Also spark plugs will loosen up from this. Race gas solves this.
