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Post by oldgeek on May 23, 2012 19:02:40 GMT -5
Has anyone here put a minarelli in a motorcycle frame? I have a old yamaha xs400 frame that needs a motor. I would like to build something no one else has.
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Post by reveeen on May 24, 2012 5:17:21 GMT -5
1) the motor on an XS400 is a part of the frame, so you must be careful when *thinking* about a re-power of this bike, as things might get "interesting" @ speed.
2) in most cases (now) the title goes with the frame. It would be hardly advantageous to license, and insure, a 50cc as a 400cc?
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Post by aeroxbud on May 24, 2012 9:11:17 GMT -5
If you used the swing arm mounts to mount the mina engine i think it would be a lot shorter wheel base than a stock XS. Would be lower at the back too with the small wheel
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Post by oldgeek on May 24, 2012 10:44:46 GMT -5
1) the motor on an XS400 is a part of the frame, so you must be careful when *thinking* about a re-power of this bike, as things might get "interesting" @ speed. I am no engineer, but even without the motor the frame looks much stronger than a scooter frame. 2) in most cases (now) the title goes with the frame. It would be hardly advantageous to license, and insure, a 50cc as a 400cc? Not too worried about this, as I would treat it as a moped, with no tag or insurance. Around here, they seem to allow anything on the road that resembles a moped as long as you obey the 25 MPH speed limit for mopeds. It would only be used for the occasional cruze around town, and the boulevard. If you used the swing arm mounts to mount the mina engine i think it would be a lot shorter wheel base than a stock XS. Would be lower at the back too with the small wheel My thoughts on how to do this are a little different. I would mount the engine where the original motor was mounted, and put a sprocket on the output shaft of the minarelli (like they have on the minarelli powered ATV's) Then use a chain to a intermediate shaft that will move the chain over to the left side of the frame over where the wheel sprocket is. Another way would be to flip the rear wheel over to get the chain drive over to the right side. I may try to post a picture, or digram of what I have in mind. |
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Post by 2strokd on May 24, 2012 13:39:37 GMT -5
It would have to be awful heavy in comparison...
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dr1445
Scoot Enthusiast
Posts: 199
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Post by dr1445 on May 25, 2012 5:02:48 GMT -5
direct drive, no clutch or transmission, sounds interesting.
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on May 25, 2012 8:31:56 GMT -5
direct drive, no clutch or transmission, sounds interesting. I am pretty sure he means the rear axle shaft for the chian sprocket like the ATVs that have these engines....not the crankshaft. |
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Post by oldgeek on May 25, 2012 16:31:32 GMT -5
It would have to be awful heavy in comparison... Yeah definitely heavier, but I think still workable. Looking for a top speed of 30 mph. I think a BBK will be a must. direct drive, no clutch or transmission, sounds interesting. I am pretty sure he means the rear axle shaft for the chian sprocket like the ATVs that have these engines....not the crankshaft. I think dr1445 was talking about no motorcycle hand clutch, or motorcycle engine transmission. It would now rely on the mina CVT. |
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Post by dizzee16 on May 27, 2012 0:09:53 GMT -5
Novel idea, you get points for that! That old bike has to be significantly heavier than an avg. 50cc scooter, so power would seemingly be an immediate hurdle. As far as mounting the engine, There should be plenty of room for whatever weirdness deemed necessary. I'm nowhere near 100% on that one, but seems logical that dropping 350cc in almost any circumstance would leave a lot of wiggle room! The real question still remains: What kind of beastly, born of Hades 50 are you gonna create to make that bike fun to ride! This my fellows, is the question of the hour! So many ideas floating around in my head... If only the money was of no consequence, and I had a shop at home that would bring John Force to tears, then I, Dizzee, would build this necessary evil for you. Just because it sounds like fun! ;D
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Post by oldgeek on May 27, 2012 20:20:17 GMT -5
If only the money was of no consequence, and I had a shop at home that would bring John Force to tears, then I, Dizzee, would build this necessary evil for you. Just because it sounds like fun! ;D I suffer from this same dilemma. No decent place to work on stuff. But since I have most of what is needed for a good start on this project, it just may go forward. (At a painfully slow pace) I really don't think the extra weight will be that big of an issue. It will be much lighter after I get done trimming off things I can do without, such as the front disc brake system, tank, and other stuff that will no longer be needed. I need to find an ATV sprocket that will fit on the output shaft of the short case I plan to use. Does anyone here have one? I may also need the bracket that is usually found along with the sprocket. |
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Post by jmkjr72 on May 27, 2012 21:58:04 GMT -5
here is where the problem will come out
if for some reason you ever get stoped and the vin is run the vin will come up as a motorcycle plus it should say motorcyle right there on the vin tag
when you deal with bikes that are less then 150cc the vin tag says motordriven cycle and thats what the vin will come back as
there is nothing special on the vin for 50cc or less as the vin requrements only talk about less then or more then 150cc
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Post by oldgeek on Jun 2, 2012 20:56:26 GMT -5
here is where the problem will come out if for some reason you ever get stoped and the vin is run the vin will come up as a motorcycle plus it should say motorcyle right there on the vin tag You are absolutley right. However lets ignore everything but the technical aspect of this idea for now. Now for the bad news. I have found that even with a short case mina there is no room to mount the engine without frame modification. I may have room to mount the engine with the cylinder pointed up about 60 degrees. Does anyone here know if the engine will run properly in that position? I know that the carb would need to be kept level, but that's about it. If I have to mod the frame, this idea may not go any further. |
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Post by ososlow on Jun 3, 2012 15:51:09 GMT -5
Its a 2t, it'll run upside down if you need it to
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Post by oldgeek on Jun 5, 2012 16:19:43 GMT -5
Its a 2t, it'll run upside down if you need it to Thanks for the confirmation, I thought it should be able to run in any position. |
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