dajogejr Posted October 9, 2007 Report Posted October 9, 2007 Dave, I thought the stock stroke 68 mm Cubs ran Banshee pistons, and the long rod 68 mm ran Blaster pistons!!?? I've got a few pistons my buddies use for ash trays from my 4 mil 68 mm and my stock crank 68 lying around..I can double check for sure. Damn good point... They don't make "banshee" pistons or 795 series in 68mm, they make Blaster pistons (big bore) that big. The blaster pistons already have the pin location offset 5mm, like the 795 series. If he got a 65mm bore stock stroke cub, he could use banshee pistons on a stock rod, or 795 series on a 115mm rod (long rod)... Come to think of it...I'm losing my mind... I'm not 100% sure if they make a 68mm bore stock stroke cub, I know they do 65mm stock stroke cub...I'll have to check, and...if they do make 68mm stock stroke cub, you'd have to get the long rods put on the crank...hmmm... I'm not 100% sure on the stock stroke/bore availability....lemme see if I can find out. Either way...a cub isn't a great idea for Dinner.. Also...how long of runs are you making bro? I'd hate to see you build a motor, and suck even more fuel draining the bowls.... Larger float bowls and a dual pingle valve might not be a bad idea for you... Quote
J-Madd Posted October 9, 2007 Report Posted October 9, 2007 I have a stock stroke, stock rod length 68 mm Cub. It's a 392 cc. Regardless, it sounds like it's not the best setup for dinner, though. Quote
BellicoseBanshee Posted October 9, 2007 Report Posted October 9, 2007 I "think" the biggest bore is a 68mm bore for the cubs, then the super cubs jump to 72mm bore. I am not sure you can get the stock stroke cubs in 68mm bore though, I think they only come in 65mm, "I think". Come to think of it...I'm losing my mind... I'm not 100% sure if they make a 68mm bore stock stroke cub, I know they do 65mm stock stroke cub...I'll have to check, and...if they do make 68mm stock stroke cub, you'd have to get the long rods put on the crank...hmmm... Stock stroke cubs are available in 65mm and 68mm bores. stock stroke cubs Quote
dajogejr Posted October 9, 2007 Report Posted October 9, 2007 Thanks!!! I knew 65mm, wasn't 100% on the 68. Wonder if they make a stock stroke super cub (72mm) http://www.wiseco.com/PDFs/Catalogs/CB07/YamahaATV.pdf According to this, they make a 66.50 mm for the banshee, 66mm for the 795 long rod series...but blaster pistons are 66 to 68.25mm bores... JMadd...you mentioned you had a stock stroke, stock rod 68mm cub, what piston are you using...and is your head/domes cut special for it?? I see Tri-Z pistons are 68mm bore by 68mm stroke....I wonder if anyone has tried them before...hmmm... Quote
BellicoseBanshee Posted October 9, 2007 Report Posted October 9, 2007 I see Tri-Z pistons are 68mm bore by 68mm stroke....I wonder if anyone has tried them before...hmmm... I just noticed some of the the YZ250/WR250s are also 68mm x 68mm.....interesting. They switched to 66.4mm X 72mm for '99 and up, though. I have not seen a Tri-Z in a long time. I wouldn't mind riding one of those......a T3 would be fun, too! Quote
Hilarious Posted October 9, 2007 Report Posted October 9, 2007 Plan on a dunable overrride tranny and lockup to make the most of the power, longer swinger and stiffer rear suspension to get it to the ground.... A cub is a commitment....100% Just exactically how much of a commitment is a cub, mr. G? Say a fella has all the condiments and sides to go with the main course of the meal, the cub monoblock cylinder. What I really wanna know is how much of a pain are they to install with only one pair of hands. :beer: Quote
J-Madd Posted October 9, 2007 Report Posted October 9, 2007 I'll have to check the various "ash trays" in my shop to see what pistons they are. I just ordered big bore domes and put it together (the first time), sent it to Jeff the second time to have the crank trued and welded. I was pretty sure they were 68 mm Banshee pistons...I'll let ya know. Quote
badassbanshee479 Posted October 9, 2007 Report Posted October 9, 2007 not bad if you have the motor on the bench. you are gonna need to grind down the box end of a 12 mm wrench to tighten the two nuts on the front of the cylinder. other than that its not bad if ya take your time!! 68 bore 68 stroke, hum.... seems like a good way to stuff a 14mil crank in a 10 mill cylinder. Quote
dajogejr Posted October 9, 2007 Report Posted October 9, 2007 Shhh....don't let the secrets out...LOL. When I say commitment, I mean trans, clutch, swingarm, gearing, intakes/carbs, exhaust...and a set of brass balls... Trust me...I loved my 4 mil on gas last year, and actually Jeff's clutch with 6 HD springs held that motor very well. But trying to shift it...forgetaboutit.... In my opinion, a billet basket, new inner and outer hub are a good bet. Actually putting it together isn't a big deal. Kinda a pain trying to hold a monoblock, making sure the rings are on the ring lands and putting the cylinder on...other than that, it's a snap. And as said, grind on a 12 point box wrench for the two front, inner cylinder nuts. They call for 28ft lbs...but two and a half "grunts" is what I use...LOL... Quote
Hilarious Posted October 9, 2007 Report Posted October 9, 2007 Shhh....don't let the secrets out...LOL. When I say commitment, I mean trans, clutch, swingarm, gearing, intakes/carbs, exhaust...and a set of brass balls... Trust me...I loved my 4 mil on gas last year, and actually Jeff's clutch with 6 HD springs held that motor very well. But trying to shift it...forgetaboutit.... In my opinion, a billet basket, new inner and outer hub are a good bet. Actually putting it together isn't a big deal. Kinda a pain trying to hold a monoblock, making sure the rings are on the ring lands and putting the cylinder on...other than that, it's a snap. And as said, grind on a 12 point box wrench for the two front, inner cylinder nuts. They call for 28ft lbs...but two and a half "grunts" is what I use...LOL... What's it about the shifting part? Clutch pull at the bars or getting it into each gear from the power transfer into the transmission? 2 and a half of your grunts = 28ft lbs. Lol Quote
BellicoseBanshee Posted October 9, 2007 Report Posted October 9, 2007 They call for 28ft lbs...but two and a half "grunts" is what I use...LOL... 2 and a half of your grunts = 28ft lbs. Lol Calibrated elbow! I wouldn't know anything about that... Quote
dajogejr Posted October 9, 2007 Report Posted October 9, 2007 getting it into each gear from the power transfer into the transmission? Mr. Germain.... My 4 mil had a year old clutch, brand new inner and outer, brand new basket, new cable, pancake bearing, perfectly adjusted shifter and clutch...and it still only shifted when the moon and stars lined up perfectly...when under full power. I had two or three other people ride it...they all said the same thing at the dunes...how do you shift that thing? I also let one or two people ride it at a drag strip 'round here....same thing. So...with everything being bascially new and in perfect adjustment....still not being able to shift....it's pretty simple. You're taking a tranny designed to handle 35HP or so (stock) tripling that...and expecting it to perform the same... Nope...ain't gonna happen... Quote
05Special Posted October 9, 2007 Report Posted October 9, 2007 R&B porting did my stock cylinders ( aggressive dune port). It was by far the biggest power gain I noticed.. Give them stockers a good port job.. You'll love it, power hits hard... Quote
WALLACE84 Posted October 10, 2007 Report Posted October 10, 2007 On the stock cylinder porting part, dont forget Denny!! (rocketboy) his shit pulls hard. In fact, I think im going to be selling my stock bore flotek dune ported cylinders with the boost ports pretty quick here. I love them but I have decided to put a 4mill vitos monoblock on it. Oh, and as far as carbs go for dune ported cylinders, I wouldnt go any higher then 30's Quote
dajogejr Posted October 10, 2007 Report Posted October 10, 2007 On the stock cylinder porting part, dont forget Denny!! (rocketboy) his shit pulls hard. In fact, I think im going to be selling my stock bore flotek dune ported cylinders with the boost ports pretty quick here. I love them but I have decided to put a 4mill vitos monoblock on it. Oh, and as far as carbs go for dune ported cylinders, I wouldnt go any higher then 30's Dunno about that....Brent's 350 dune ported by FAST pulls very hard with 35s on it... Quote
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