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I just inherited an excellent condition '96 Banshee, but I didn't build it. I'll list the mods I'm sure that have been done, and since I don't have access to a dyno, I'm hoping someone can give me a ballpark HP figure based on these mods/hardware: It has Toomey T5's and silencers, nearly perfect cylinder compression, an aftermarket timing plate, the standard Toomey airbox vent mods, carb throats 1.5mm over stock diameter, and jetting done for anywhere between sea level and 2500 feet. The displacement is stock, but it has a fairly aggressive port/polish job on the exhaust side, and aftermarket reed valves (I think it might be a 4-reed setup, but I'm not sure), as I'm not much of a mechanic. Knowing mine is a '96 and had about 47HP stock (not 34 like the post-2000 models), what kind of estimate would you give on its likely HP output range?
Hey guys, I'm a brand new Banshee owner,that is I'm new to Banshees I wish I had a brand new Banshee lol! I've owened quads since I was 17 and I'm 34 now. I'm mechanically inclined and catch on quick so here goes. After deciding to look for a project banshee I found one within a week,picked her up and brough her home. It's a 2000 model with a clean title and in pretty good shape chassis wise. It has new carbon fiber plastics, new pro elite bumper,new pro elite nerfs, new ITP hole shots on black SS wheels DMC exhaust a cool head and I believe that's about it. The engine is dead I pulled the top end and it broke a ring and trashed the right side jug and dome. I've decided to build a 421 4 mil serval after a lot of research. I think it'll work best for what I want to do with it. I mostly play ride with my sons,wife and friends but want to be able to readily spank some guys at the local mix park sand drag strip. My boys are 9 and 11 and both own 400ex's I also own a yfz450 with quite a few mods , a blaster ,TRX450 and a 660 Grizz. The engine: I went ahead and pulled the lower end threw it on the bench and have it ready to split tomorrow (had to wait for flywheel puller). I want to open it up for 2 reasons I want to learn the banshee engine inside and out like my other quads power plants and I want to make sure there's no trash in the crankcase. I plan to go back with the stock jugs .060 over with a set of Vito's forged super stock pistons and run it like that until I save for the serval build. With all that out of the way, I have a few questions. 1.) what kind of horse power can I expect the 421 4 mil to make? I'm not asking for a human dyno here, I know a lot of factors come into play. It seems 2 strokes really make power easily so Imagine that it can just as easily be hindered by improper tuning etc. i want to run 93 pump gas most of the time and fuel when I take it out to play at the drag strip. I know that the DMC pipes will have to go I plan to run Shearer pipes on it. 2.) what jetting is recommended for the set up I plan to run first? Mods will be ; .060 over stock jugs,no porting, DMC,cool head with 20cc domes. My elevation is 86' and temps are between 40-60 in winter and 90-110 in summer. 3.) jetting increments, On my other quads the numbers are as follows for example 48 pilot,175 main. I noticed when browsing jet kits the main sizes are 300-310-320 etc. Are all the banshee jets numbered this way, when I say banshee I mean the Mikuni carbs. If so is there some sort of crossover chart or something? if not can some one help me out with what stock jetting is for main and pilot jets so I kinda have an idea where to start. 4.) when I build the Serval is there any work needed on the cases like clearancing or anything? Also can I or if I have additional port work done on the Serval jugs or the cases will it adversely affect the low-mid range? I think that's it for now, didn't mean to write a novel but this is my first ever 2 stroke and the only way to learn is to ask. So im askin. Thank you guys in advance. I'll get my profile sorted out as soon as I can. I belong to a few other forums and I know about the whole "use the search button" thing lol. I did trust me, I've been reading for a week. Just needed more specific answeres to my questions.