Author Topic: polonda build. (Read 7551 times)

T8R6X · « **on:** August 04, 2013, 12:29:33 AM »

I just picked up an entire polonda basket case for 200 bucks. mainly for parts but I wanna make it work, so first off wheres the place to get the head o rings. I just ordered a degree wheel to see if the cylinder will be of any use as well. Thanks Austin

Victork · « **Reply #1 on:** August 04, 2013, 02:05:10 AM »

200 hundred buck huh. Any pics?

Morse250r · « **Reply #2 on:** August 04, 2013, 07:55:24 AM »

Get ahold of Polonda on here he has one and is very sharp on the builds

T8R6X · « **Reply #3 on:** August 04, 2013, 08:53:47 PM »

Not off craigslist but a friend who didn't have any patience I try to get some pics up in the next few days, mostly bought for the transmission and kicker gearassembly and to have a spare crank

Polonda · « **Reply #4 on:** August 05, 2013, 07:59:24 PM »

What do you need to know? I know a bit about them. As far as head o-rings what head is on it? Is it a stock one that is o-ringed? If so that is a custom machined head so you will need to measure the grooves and find some o-rings locally. I actually make my own o-rings out of Viton stock.

Lets see this cylinder/motor. What is the motor setup for?

motofool250r · « **Reply #5 on:** August 05, 2013, 08:23:25 PM »

base gasket seems to be trouble on these motors.

T8R6X · « **Reply #6 on:** August 05, 2013, 08:41:16 PM »

ill try to post some pics here soon, the head is a 2 piece just like a cool head, and the seems to be a spacer welded to the bottom of the cylinder... the rod is a ck109 i think its a long rod. heard its not a good idea to run it in this setup. also when the cases were machined it looks like they were welded up, ive only seen epoxy is that normal as well. just trying to decide to build it or just keep and the good parts.

Polonda · « **Reply #7 on:** August 05, 2013, 08:48:11 PM »

Depending on how it was built the base gasket can cause all kinds of issues. The Polaris cylinder and Honda cases do not match perfect. Jug needs to be welded to fill the holes and then re drilled. This can warp the base and cause more issues. They also use a spacer plate which opens up more possibilities for air leaks.

On mine I made a spacer that matches the Polaris cylinder on one side and the Honda cases on the other. Makes for a smooth transition and more sealing surface.

DO NOT EVEN BOTHER RUNNING THE CYLINDER WITHOUT DOING A LEAKDOWN.

Polonda · « **Reply #8 on:** August 05, 2013, 08:53:13 PM »

Quote from: T8R6X;7393

ill try to post some pics here soon, the head is a 2 piece just like a cool head, and the seems to be a spacer welded to the bottom of the cylinder... the rod is a ck109 i think its a long rod. heard its not a good idea to run it in this setup. also when the cases were machined it looks like they were welded up, ive only seen epoxy is that normal as well. just trying to decide to build it or just keep and the good parts.

A couple companies made a cool head for the Polaris cylinder. Check HPD for the o-rings.

Is this motor polished by chance? If so I'm pretty sure I'm familiar with it. If you decide to part with it let me know. Been wanting to build another motor.

Polonda · « **Reply #9 on:** August 05, 2013, 08:55:57 PM »

http://www.hpd-inc.com/400model.htm

T8R6X · « **Reply #10 on:** August 05, 2013, 09:15:03 PM »

yes it was polished at one time. i can txt you some pics in my opinion the cases are junk. all i really wanted was the crank transmission and stuff like that. its at 84mm for the bore size.

T8R6X · « **Reply #11 on:** August 05, 2013, 09:20:39 PM »

[ATTACH=CONFIG]1223[/ATTACH][ATTACH=CONFIG]1224[/ATTACH]

Polonda · « **Reply #12 on:** August 05, 2013, 09:22:41 PM »

Quote from: T8R6X;7399

yes it was polished at one time. i can txt you some pics in my opinion the cases are junk. all i really wanted was the crank transmission and stuff like that. its at 84mm for the bore size.

According to my wife all I have is junk. May as well have some more! Shot me some pics. May be interested.

Polonda · « **Reply #13 on:** August 05, 2013, 09:28:19 PM »

Cylinder is pretty rough. What's the bore and ports look like?

T8R6X · « **Reply #14 on:** August 05, 2013, 09:30:23 PM »

lol not too good.... ill try to get some pics the stud holes are wallard out