Zillaguy

I am looking for a stout trail bike that will come out and go to Bull Gap/Mack Lake alot over the summer. This is going to be my beater, I can beat/break and not care. I was looking on ebay and found a Serval set up with pistons for $1100 new, and a crank that appears to be Chinese maybe, real cheap like $360, but i'm not sure about it. It's a 4mm stroke 115 long rod. Found domes for $60 and a tz maxload kit for $80. the shift star is modded, i have hinson basket, inner, and pressure plate, barnett clutch, pro design intakes no crossover or bullshit bottle, vf3's, 3/8's spacers, pro design head,fmf golds, but have a set of CPI in frames for this build. Also 28mm pwk's.

That's what I was thinking was to go used.. I really want to go 421 on it, I have been watching ebay for used 68mm cub or serval cyl set-up... I have a line on a welded 4mm 115 rod crank for $250.00 or do ball joints on dudes F-350 (labor only of course). i already have full gasket and seal set, and 3-bond. I can do the bore/hone myself. So basically I need a used cub or serval cyl, a crank, and some new pistons/rings/pins/bearings/clips? I do most everything myself if i can, as far as technical and mechanical. i am a state of MI. and ASE master certified automotive and motorcycle mechanic, 18 years experience, and own Reliable Auto Repair of Wayne. I have been building custom cars and bikes my whole life but am new to banshees.

trying to keep the entire build around $1000-1200, that serval top end is outta my price range.

I'm in Michigan....I live in Westland, but am from Romeo/Rochester area.

I want to build a 421 motor for my trail bike.. It doesn't have to be the best of the best.. I know I need a 4mill crank, but which one, 115mm rods or 110mm rods? I also know i need a 68mm bore, will the Athena 392 kit work with a stroker set-up? Will it need a spacer plate, or can I run cut domes in my Pro-design cool head? Can I run a Pro-Design cool head with the Athena cyls? Right now this bike is 80 over with egg shaped cylinder walls and i'm not interested in repairing them, so replacement is the only option. ANY advice on parts would be appreciated.. I have had Suzuki's and Maico's all my life, and have only been into Banshee's for about two years.. I know what makes power for the $$$ on LT's and the old Maico 490's but am still learning the tricks of the Banshee trade! Thanks.

It will be bitchin!! The rd500 motor i'm using is .050 over race ported and polished, has had the power valves massaged, and has a set of hand coned pipes custom made by Eric Cook from PFR racing. The motor dynoed 130hp @ 11,600 RPM and 83lb/ft of torque@ 9300rpm.. I had to take my Banshee chassis jig it up, cut it to pieces and make new front down tubes and make the entire engine cradle from scratch... The lower frame rails are now 2.5 inches lower than a stock Banshee chassis to make room for the height of the rd 4cyl... I'm running a +6 swinger w/ a wheelie bar, single a-arm conversion... This is going to be a badass drag bike when done.. I'm setting it up for ashphalt, to run 1/4mile at Milan dragway in Milan,Mi. this summer. Hoping the bike runs low 9's.

NO way it went 112mph! Not possible mechanically... My LT500R (Quadzilla) that is a 650cc DR.Q "Roidzilla" motor, with a DR.Q pipe will go 112 but not a mildly built at best Banshee... My new project, 94 Banshee with an 84 Yamaha RD500 V-4 (4cyl 2 stroke) motor will rip about 150 in a straight line with the right tuning... Got the idea from Robert (DR.Q) he built a Zilla with a Suzuki Gamma 500 4cyl 2-stroke motor... Go to youtube and listen to that bike!

1) What type of aftermarket exhaust do you have? FMF Gold's W/Power Core II's 2) What type of airfilter do you have? K&N Filter PODs w/Outerwears 3) Are you a)running a stock airbox with lid stock airbox with NO lid c) Stock airbox with vents d) no airbox at all? NO AIRBOX 4) What is your elevation? 600 - 900 ft 5) What size pilot jets are you using? 27.5 6) What size main jets are you using? 290 7) What temperature is your Banshee jetted for? 65 - 100 8) Do you have a port job? casting clean up, polished exhaust ports, no port mods 9) What kind of carbs? Stock Mikuni w/TORS Elim. 10) What size carbs? Stock 12) Do you have a coolhead? yes 13) What brand is your coolhead? PRO DESIGN 14) What size domes are you using? 20cc 15) What type of fuel are you using) 93 pump gas 16) What gas/oil ratio you use? 32:1 17) What type of premix you use? KLOTZ R-50 I also have Pro-design billet intakes w/NO crossover or boost bottle, and V-Force III's, the engine is also .050 over with Wiseco pro-lites