Kit question, I'm buying most of a Motor from a person on this forum, he had it set up for a parmakit that I can't seem to find for sale, "out of stock" I'm looking at two different budget head options,
http://www.1977mopeds.com/product/50311/Motobecane-AV7-70cc-77-Cylinder-Kit/
or possibly this.
http://www.1977mopeds.com/product/1223/Motobecane-AV7-65cc-Malossi-Kit/
Opinions?
I've read some really good reviews on the Malossi. They make quality parts. I haven't seen that as available for a long time, either, so they must have gotten them in recently. The 'house cylinder' from 1977 doesnt look that special, which is accounted for in the price. If you dont want to drop $180 on a cylinder kit, though, I'd go this route:
https://www.treatland.tv/motobecane-av7-airsal-74cc-47mm-kit-p/mbk-av7-airsal-kit-47mm.htm
But there's always the 74cc parmakit: https://www.treatland.tv/motobecane-47mm-parmakit-p/motobecane-47mm-parma-kit-av7.htm
The parmakit will require a spacer to be cut for the ports to line up correctly, or you wont have the full benefit (port timing will be off). The airsal I have heard has better low end grunt, parma is better for high rpm blasting.
The malossi kit has a lot of torque, too.
They only have a limited number of the Malossi kits, hopefully I can grab one. I have no access to machining skills or machining tools, so I really need "bolt on" readiness. Also living on $685 a month does not leave me much budget for parts, and no budget at ALL for machinists skills.
I really didn't want to go to 75cc as I'm still trying for some economy. But do you think 65cc is enough?
The parmakit is pretty awesome, but like nick said requires some messing with. It helps to have access to machine shop equipment, but it isn't really necessary. You basically put in some extra base gaskets so the piston clears the exhaust port and then remove a little bit of material from the top of the cylinder to make up the difference. You can do this by holding the kit top down on some fine grit sandpaper fixed to a flat surface of some sort (piece of glass) and sanding in a figure 8 motion. It'll take forever, but it can be done without fancy tools.
That said when my parmakit blew up I went for the 47mm Airsal. From everything I read performance was comparable and it didn't have the core shift defect. Still tuning so I don't have the full verdict yet.
As far as fuel economy goes to me it's more about how the engine as a whole utilizes the fuel rather then raw displacement. Having a high performance 50cc kit with big ports and a large carburetor will get significantly lower mpg then a stock setup as well.
You mean like this one?
https://www.treatland.tv/AV7-airsal-70cc-kit-p/mbk-av7-45mm-airsal-kit.htm
Bought the 70cc Airsal, plan on using a stock head.
:( nope the one nick linked..
https://www.treatland.tv/motobecane-av7-airsal-74cc-47mm-kit-p/mbk-av7-airsal-kit-47mm.htm
Meh, I wanted 70cc, I didn't have the money to buy a new head, and I'm thinking in terms of a motor I don't have to pull apart and mess with on a regular basis.
I told Treatland what I was shooting for, and THEY suggested the 70cc kit.
Its not too late to change the order, nobody is shipping till the second, but now I don't know what to do. The bigger kit means buying a different head. And money is going to be stretched thin now.
You can use the stock head and it's only $4 difference
I wish I had known I could use the stock head, I was told I couldn't. :( Too late now. They told me they shipped. It'll get me through the summer. Ill do the other motor right.
I really feel stupid now.
Fixed it! caught them before they shipped. You are SURE this will be ok with the stock head or should I try to budget for something with bigger fins?
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