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Post by oldgeek on Dec 21, 2014 17:55:36 GMT -5
All of my mockups were with either a 45mm 90cc crank, or a Hoca 39.5mm (I meant 43.5) 90cc crank. The Hoca 39.5 (I meant 43.5) crank matched up to the 54mm, 8 port, 77mm cylinder with 183 exhaust and 130 transfers, deck height looked real good. What pipe would match well with these durations? And what durations would go well with this pipe, or maybe a malossi MHR racing 70 pipe?  |
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Post by 190mech on Dec 21, 2014 18:46:46 GMT -5
All of my mockups were with either a 45mm 90cc crank, or a Hoca 39.5mm 90cc crank. The Hoca 39.5 crank matched up to the 54mm, 8 port, 77mm cylinder with 183 exhaust and 130 transfers, deck height looked real good. What pipe would match well with these durations? And what durations would go well with this pipe, or maybe a malossi MHR racing 70 pipe? Dang!I never saw a 90cc motor with less than 42mm stroke..Thats a new one on me..Looks like a full hydroformed pipe,have not got the measurements for that one,so I cant say..Would love to get them and see if its good for that and other builds though.  |
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Post by oldgeek on Dec 21, 2014 19:16:13 GMT -5
All of my mockups were with either a 45mm 90cc crank, or a Hoca 39.5mm 90cc crank. The Hoca 39.5 crank matched up to the 54mm, 8 port, 77mm cylinder with 183 exhaust and 130 transfers, deck height looked real good. What pipe would match well with these durations? And what durations would go well with this pipe, or maybe a malossi MHR racing 70 pipe? Dang!I never saw a 90cc motor with less than 42mm stroke..Thats a new one on me..Looks like a full hydroformed pipe,have not got the measurements for that one,so I cant say..Would love to get them and see if its good for that and other builds though. As usual, I am mixed up! I got too much going on personal and scooters right now! I really apologize, I don't know what is happening to my mind lately, it is worse than normal! The Hoca crank is 43.5 stroke, Not a 39.5 like I said previously. I will try to measure the pipes at some point, so you can give me an idea of where they would work. That pipe looks like the hydroformed stuff you were working with, but I believe this one is just 2 stamped half welded together. |
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Post by oldgeek on Dec 26, 2014 17:22:58 GMT -5
Get this! Looks like I will be putting this motor in a "joint project" vento zip scoot, IT USES BUSHINGS FOR THE MOUNTS!   I cant believe I spent nearly 1/2 a day getting the bushings out, and now I need them back in. They were brand new, never used. Where can I get some ordered from? |
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Post by 190mech on Dec 26, 2014 17:58:33 GMT -5
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Post by oldgeek on Dec 26, 2014 18:03:10 GMT -5
Thanks, just spent 10 min there trying to find them before I read your post. |
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Post by oldgeek on Dec 26, 2014 21:30:53 GMT -5
I installed the crank and sealed the cases today. It was easy since the crank journals were polished to a slip fit.
I installed the crank seal on the flywheel side and its keeper, but I jacked up the seal for the variator side while trying to tap it in with a 1/4 extension and bent the metal lip on the seal. I started a couple drywall screws in the ring of the seal and levered it back out. Of course the seal was ruined. I have been meaning to make a seal driver out of PVC pipe but I forgot all about it, and I was tapping it in with a 1/4 extension and got it crooked I guess. I need to make one before I jack up yet another seal, if I even have another one.
I also got what is left of the vento zip motor from the guy that has the scoot. I plan on pulling a few things off of it and putting them on the 99cc motor. I also got the rear facing intake for it. I am not thrilled about using it but there is no room for another type as far as I can tell. My buddy said he had to unbolt the intake from the motor before he could remove the motor from the frame.
I checked to see if the rear rim fits the output shaft on the motor and it does, but unfortunately I noticed the tires are shot. They are 100/60-12". I finally found some that size at partsforscooters for $30.99 each. Those guys are on vacation until Jan. 5th so I guess I will have plenty of time to finish everything else.
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Post by 2TDave on Dec 26, 2014 23:04:47 GMT -5
Glad to hear it's together. I've done the same with that seal and now have a homemade pvc driver. Nice work!
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Post by oldgeek on Dec 27, 2014 20:13:59 GMT -5
Good progress today. I made a seal driver from 1 1/4" PVC and used it to put the flywheel side crank seal in. I still had a bit of trouble with it, but I got it done. I cleaned up the stator, slotted the mounting holes, and put it and the flywheel on. I also cleaned the start components, and installed them except for the starter. I temporarily installed the cylinder and decided to test fit the turbokit exhaust. I was surprised the pipe fit like a glove, but only after I removed the center stand of course. It looks cool as yell so maybe it will run like yell! LoL I ordered, and paid for 2ea 21mm dell clones a while back. The package came today but they sent only 1 carb. I sent an email out to the seller about the issue, I hope they remember they only boxed up and sent 1 to me or I may be sol on that deal. I pulled the throttle cable elbow from the top of a stock carb and drilled the top of the dell so it would fit. The stock rear facing airbox is shot so I will need to rig some type of filter or airbox for it. Thinking of a 100 MJ and a 40 pilot jet for starters, but I am open to suggestions.  Also open to suggestions for variator weights. I am going to use a HOCA 16 x 13 along with a stock rear pulley and clutch that has been tweaked just a bit. |
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Post by 90GTVert on Dec 28, 2014 7:52:45 GMT -5
Sounds like you should be in the ballpark with that jetting. Likely slightly large for an air box, possibly a touch small for a pod.
I ran a lot in the 5-8g range for 90s with Hoca variators. Depends too much on the contra, exact RPM desired, and rider preference to some degree to give precise suggestions IMO.
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Post by oldgeek on Dec 28, 2014 8:31:02 GMT -5
Sounds like you should be in the ballpark with that jetting. Likely slightly large for an air box, possibly a touch small for a pod. I ran a lot in the 5-8g range for 90s with Hoca variators. Depends too much on the contra, exact RPM desired, and rider preference to some degree to give precise suggestions IMO. Thanks for the info! We are similar sized riders, so at least I have some idea of how to set up this 99cc. I think I may try to use the kart style airbox that gave me so much trouble when I tried to use it on my 70cc, only this time there will be more holes in it. |
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Post by oldgeek on Dec 28, 2014 23:22:34 GMT -5
I worked on the intake, carb, and airbox today, I hope this setup fits under the vento zip alright.  I found out the hard way on my 70cc build that this kart style airbox is restrictive. I have the remedy for that problem. I am going to cut most of the 2 white tubes off, and figure a way to anchor the filter material back in them. I am also going to add a few of the black snap in vents  I also have plans to vent the CVT cover, most likely with a bunch of holes. Since I will be waiting on parts, and tires to arrive for almost 2 weeks, I should have plenty of time to wrap a few things up. The rest of the scoot is in pieces, I hope I can get some help from the shop I am getting the Zip from to put everything back together, I think they want to see it running as bad as I do! |
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Post by oldgeek on Dec 28, 2014 23:50:25 GMT -5
I loaded up the variator with the heaviest sliders I have on hand, 6g and installed it. Then I cleaned and pieced together a pulley and clutch assembly from the pile of used stock stuff I have on hand. I found a decent used belt, and finished putting the CVT together.
The biggest thing left to do on the engine is to finish prepping the cylinder, check the ring endgaps, and bolting the cylinder up.
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Post by oldgeek on Dec 29, 2014 21:59:16 GMT -5
I was looking at the carb and the intake when I realized the ID of the intake is pretty small even after I polished/opened it up a bit. I was planning on using a 21mm dell clone but is there any need to? I think I can get the intake opened up to 19mm where it connects to the carb but thats about it. Should I go with the 19mm or 21mm dell? The intake tube does flare to about 24mm where it connects to the motor.  |
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Post by 90GTVert on Dec 29, 2014 22:26:19 GMT -5
I'd just go with the 19mm at that rate.
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