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Post by Dandy Dan on Dec 31, 2005 12:47:20 GMT -5
The outside diameter of the bearings is 57mm. The distance between the insides of the bearings is 44mm. The total crankshaft length from tip to tip is 237mm.
I'll measure exactly how close the piston comes to the crank at the bottom of it's travel later when I've got my bike taken apart because I'm using the same piston but to give you an idea, the distance from the center of the hole the pin goes through down to the top of the crank is 20mm.
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Post by Dandy Dan on Jan 10, 2006 12:02:07 GMT -5
The bottom of the piston has 10mm of clearance from the crank when it's at the bottom of it's stroke. The piston pin is about 9.95mm in diameter (it fits into a 10mm hole) and it's about 29-30mm long and held in place by a metal hoop on either end that fits into a groove.
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Post by timberwolfmadcat on Jan 10, 2006 18:28:34 GMT -5
How come the pistons all. Does ABE have them? I keep getting emails about them, but when i replied, no reply. Just curious
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Post by Dandy Dan on Jan 10, 2006 21:00:20 GMT -5
How come the pistons all.  Nobody has any pistons. Abe has said he'd be willing to do a kit but there isn't enough interest in his kit because he wants to do the full 9 yards including bigger valves which means big money. Chanito is planning on just offering the piston which means the cost is much less and pretty much just as good. Chanito is still waiting on his test engine from Pome so pistons likely won't be ready until spring. |
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Post by timberwolfmadcat on Jan 11, 2006 21:35:04 GMT -5
Ok, thankers for satisfying the curiousity, i really dont wanna do the valves, i cant justify spending that much for a little extra performance, would prolly be cheaper to do an engine swap |
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Post by Dandy Dan on Jan 11, 2006 23:33:58 GMT -5
Chanito, you can't really see the cylinder plating if you just take the head off but things are a bit clearer when you're looking at the sleeve from the other end. It appears that the plating it at least 2mm thick and it's really distinctive....I'm not sure why you can't see it from the other end. Anyways, I'm not sure how the plating affects big bore pistons but if the plating is say 2mm thick then a 41mm piston would still leave us with 1/2mm of plating. If you have any questions I might be able to help you out.
Also there's a guy in the classifieds section of this site that is parting out a smashed Ruckus and the engine looks good. I told him you might be interested since Pome's engine seems to be taking a while. It'd really be nice to have those pistons by spring because in March/April the scooter scene really takes off and this site is gonna be hoppin.
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Post by chanito on Jan 12, 2006 14:21:48 GMT -5
:)Thanks DD, i was kind of busy lately helping a guy in Europe with an ice racer, and a long distance tunning is as hard as doing it on this forum, so i was not in as much as i would have like it, is funny we always drool over European cars or some Japanese cars, and in Europe the Infiniti FX is one of the bigger sellers in the grey market over there, so this guy decide to make one into an ice racer and is a crowd favorite, any way, i really like the idea of getting back into the piston project, if the cylinder is plated, we will need to replate it so the rings will seal properly, i have to get in touch with the guy in the machine shop so he can tell me what is that we need to have done so we can do it and tell everyone else what to do, but i need the engine block so they can do some phisical tests, so i guess i have to wait untill i get one engine, i hope we can get the broken down ruckus, so we can start working on it |
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Post by timberwolfmadcat on Jan 12, 2006 15:45:55 GMT -5
Will the Oversize piston be compatable with the H.O Cam?? Debating on getting the cam right now while i wait.....
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Post by Dandy Dan on Jan 12, 2006 15:53:44 GMT -5
Yup no worries!
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Post by timberwolfmadcat on Jan 12, 2006 15:57:51 GMT -5
Awesome, well, might as well order it, while theyre fixing my ruck might as well throw the H.O cam in at the same time, They havent even got a chance to look at it, there backed up right now, hehe, cam and some roller wieghts
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Post by Dandy Dan on Jan 12, 2006 17:36:09 GMT -5
Do it! The install can be a bit daunting but a few things to keep in mind are that:
- you'll need to re-shim your valves using fatter shims, especially the intake valve
- you'll need someway of pressing the bearings on to the cam. They just 'slide' on but it's definately a tough 'slide'. I suggest using sockets that match the bearings and then perhaps setting it in a vice and cranking it on. Don't try beating the bearings the bearings on with a hammer cuz if you get them crooked or damaged things will go south.
- you don't need to remove the head for the install I think. I believe you can just remove a bunch of wires/hoses so the engine pulls out of the scooter along with the drive unit and rear wheel. Then just pull the valve cover off and the thermostat of the left side of the head and you should be able to slide the cam in. Really you just disconnect the carb, airbox, all the wires, the fuel line and then the main pivot bolts.
- make sure you either mark the chain and sprocket so you can get them lined back up or if you have the shop manual it'll show you another way to do it using the tick marks. Don't drop the chain into the engine either or let it go really slack in case it comes off the gear on the crank. If this happens your job just got A LOT harder (although that's good practice for the big bore install.
Oh, are you installing it yourself or getting them to do it? If they are they disregard the above info.
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Post by chanito on Jan 12, 2006 21:27:54 GMT -5
 I am so looking forward to do this big piston stuff, but the engine is looking more an more like a bigfoot, lots of sighting and nothing concrete 
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Post by timberwolfmadcat on Jan 12, 2006 22:44:04 GMT -5
what about that smashed up ruck? And DD ill have them install it, anything engine components i dont touch, too much stuff to break
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Post by wickedsf on Jan 13, 2006 0:42:23 GMT -5
Man I was planning on getting the CAMS, but because of DD's post. Forget it. Sounds like too much trouble.  |
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Post by Dandy Dan on Jan 13, 2006 9:42:43 GMT -5
It's really not that bad but you do need to have the ambition to put some work into it and enjoy it. If you really don't wanna install it you can just take it to a shop although that does cost quite a bit more.
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Post by chanito on Jan 21, 2006 17:10:27 GMT -5
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Post by Dandy Dan on Jan 21, 2006 18:30:58 GMT -5
Hurrah  !!!! So when's your estimated date? It seems to me that they should be ready right about when the scooter market goes into overdrive in the spring. Chanito, have you ever checked to see if 'Total Seal rings' could make us some 41 or 42mm rings? I imagine they'd be more but I've heard a lot of good things. |
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Post by timberwolfmadcat on Jan 21, 2006 20:37:15 GMT -5
  Yeah i am so happy i am finally going to get my hands on that elusive engine ;D The pistons are coming! the pistons are coming! Long awaited and well deserved chanito, lemme know as soon as thier ready, and i shall begin my quest for speed |
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Post by chanito on Jan 22, 2006 9:24:55 GMT -5
Chanito, have you ever checked to see if 'Total Seal rings' could make us some 41 or 42mm rings? I imagine they'd be more but I've heard a lot of good things. :-/When you tell an aftermarket company that you want them to make performance parts for your scooter, they more likely will laugh at you, so i just try to deal with companies i have friends in, so at least they will know i am not a crazy guy with a silly dream (which i am), but anyway, in order to make rings they have to be in the thousand, to be economically reasonable (i do not want the rings to cost more than the pistons), but i will let you know in a couple of weeks ;D |
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Post by wickedsf on Jan 26, 2006 13:15:18 GMT -5
Can't wait! You are our only hope for a really faster Ruckus.  Keep us posted. |
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