Gemeiner Posted October 20, 2015 Author Report Share Posted October 20, 2015 Since I got it I haven't done a top end on it. So I'm gunna do that this weekend.. I have the stock pistons. Hoping he didn't bore it at all like he said he did. The guy said a lot of shit that I don't believe like only run race fuel and he bored it over and he used to race. But when I got it everything was stock except the pipes and he rode it like a bitch so I don't believe he races. Quote Link to comment Share on other sites More sharing options...
Sandking Posted October 20, 2015 Report Share Posted October 20, 2015 (edited) Check the compression if it's good no need for a topend. Edited October 20, 2015 by Sandking Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 20, 2015 Author Report Share Posted October 20, 2015 K I will. Just checked my plugs for the first time in a while and they're definitely oily. Quote Link to comment Share on other sites More sharing options...
Strm Trpr Posted October 20, 2015 Report Share Posted October 20, 2015 OK, so for shits and giggles, please list all of your mods. I saw you're mixing 32:1 with 91 octane. What oil are you mixing? I run Yamalube 2R at 16oz to 5 gallons of fuel nets a mix of 40:1. Been running that ratio since 95 with zero mechanical failures. 32:1 is rich as hell for today's oils. Rich, well, it's actually lean if you think about it in fuel ppm. 32:1 means for every 1 droplet of oil, you have 32 droplets of fuel. 40:1 increases your fuel to oil ratio. Make sure your fuel is fresh when you're tuning. Idle must be dialed in. I shoot for 1500rpms with an eBay two stroke digital tach and carbs sync'd using a FAST's carb sync tool to measure vacuum during idle and at part throttle, 5500rpms. Your tuning is primarily done without air filters, so when you put a dirty or over oiled air filter on your motor, it's going to richen up your tune a tiny bit due to less air actually entering the motor due to the dirt/oil restricting airflow. You want fresh, clean air filter(s), << not sure what your set-up is. And, you need to do a proper plug chop to dial in your mains. If you do not know what it is or how to do it, Google "plug chop banshee hq". How old is your machine? And if the clown you bought it from was a lying POS, then you really don't know what you have. Check compression and report back. Pull both plugs screw in a quality tester, not harbor freight, at a minimum, a Craftsman tester, kick the piss out of it until the needle stops. Hold the throttle WFO to get as much air in there as possible. And last but not least build a leakdown tester. 1 Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 20, 2015 Author Report Share Posted October 20, 2015 Lot of good info rt there. I was using Yamalube but I've been using am soil dominator for a while. One uni air filter, no lid . V force 4 reeds pc platinum pipes, 304 silencers for now, stock head for now, other than that I'm just doing suspension rt now. He said it's bored but I don't believe him. Just bought a tachometer on ebay, looking for a synchronizer, and I'll make a leak down tester. Have a compression tester, idk if I have time before work today tho. Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 20, 2015 Author Report Share Posted October 20, 2015 138 right side 139 left side. I'm real surprised cuz I ride it alol the time since I live in the middle of nowhere Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 20, 2015 Author Report Share Posted October 20, 2015 That's fucking real good right Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 20, 2015 Author Report Share Posted October 20, 2015 Seems a little weird Quote Link to comment Share on other sites More sharing options...
Strm Trpr Posted October 20, 2015 Report Share Posted October 20, 2015 Amsoil Dominator is designed for 50:1. The compression results seem very high for a stock head at 4k ft asl. The head has to be shaved and that's why he said to use race gas. What was the elevation were the previous owner rode? When you come down to Glamis from 4k ft asl your static compression is going to increase to > 160psi... Scroll down almost to the bottom of the page to the "Approximate Cranking Compression" table. http://www.nossmachine.com/banshee_heads.htm FAST Sync Tool http://www.farmandsandtoys.com/partdetail.asp?partid=59 Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 20, 2015 Author Report Share Posted October 20, 2015 So it is in fact safe to run dominator at 50:1? I was always just told to run 32:1 to play it safe. So ill be even richer right? He's at the same altitude as me. And I've ridden the bike a lot and I've had it for about 11 months and the compression is still high. Is there a way to tell just by looking at the head or no? So if I go down to glamis I'll need to run race fuel or octane booster I'd assume. And if i did run dominator at 50:1 my jetting would be off further. Lot of factors. Quote Link to comment Share on other sites More sharing options...
Strm Trpr Posted October 20, 2015 Report Share Posted October 20, 2015 So it is in fact safe to run dominator at 50:1? I was always just told to run 32:1 to play it safe. So ill be even richer right? https://www.amsoil.com/shop/by-product/motor-oil/2-stroke/dominator-synthetic-2-stroke-racing-oil/?code=TDRQT-EA Half way down the page under applications. Fuel to oil you'll have 50 ppm of fuel to 1 ppm of oil, so yes, your fuel will be richer and so will the air/fuel ratio. You'll have more fuel ppm in your air/fuel charge if you go to 50:1, so yes, your jetting will be richer too. So if I go down to glamis I'll need to run race fuel or octane booster I'd assume. And if i did run dominator at 50:1 my jetting would be off further. Lot of factors.Yes, you'll need at least 50/50 mix. Leakdown test your motor and report back. If you find any leaks, you'll want to address them. Once you're all sealed up and you're ready to tune, mix a fresh batch of 50/50 race/pump with dominator at 50:1. Did you confirm your jetting? Pilots? What Needles do you have and what clip position? Mains? Dial your motor in to your elevation, then tuning for elevation is as easy as changing the mains 1 size per 2k ft elevation change. Going down from 4k ft to sea level would require richening up the mains two jet sizes. You might need to fatten the needle a touch, but with 30 pilots that thing has got to be a pig at 4k ft and will get better asl. Then once your close you might need to tweak the airscrews a touch to get the throttle to snap off idle. Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 21, 2015 Author Report Share Posted October 21, 2015 I'll do that asap. Thanks for the help dude. I'm running 30 pilot with 310 mains for sure, I looked up a post from when I was trying to figure it out. Can't remember the needle position off hand but air screw is like 2 out. Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 21, 2015 Author Report Share Posted October 21, 2015 Need to get a better jet kit. I have the 27.5 and 30 pilot, and 310 320 330 and 350 mains. Just what it came with. Quote Link to comment Share on other sites More sharing options...
Gemeiner Posted October 21, 2015 Author Report Share Posted October 21, 2015 Got 270 280 and 290. Hopefully should be close Quote Link to comment Share on other sites More sharing options...
willaduncan Posted October 21, 2015 Report Share Posted October 21, 2015 I think you will find those numbers are closer to what you need Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
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