Author Topic: Polaris 400 Cylinder on 250r (Read 5384 times)

ACampbell · « **on:** April 04, 2014, 12:31:10 AM »

I recently purchased a 88r. It has 330 Prox cylinder. I am now looking at another r with a 400 Polaris cylinder, I'm not sure of the power and reliability of this set up. Does anyone have experience with them? Or is this something I should shy away from? The quad has not been ran in 3 years. A local shop did the work and the guy ended up in jail then rehab and has never called. Now I will have an opportunity to buy the quad or motor. Let me know your thoughts.

Tbone07 · « **Reply #1 on:** April 04, 2014, 09:18:19 AM »

If you can buy it for a good price i'd say hell why not?

There's a few guys on here who have some pretty extensive knowledge of the "Polonda" motors, i'm sure they'll chime in soon

Jerry Hall · « **Reply #2 on:** April 04, 2014, 10:43:44 AM »

Quote from: ACampbell;30780

I recently purchased a 88r. It has 330 Prox cylinder. I am now looking at another r with a 400 Polaris cylinder, I'm not sure of the power and reliability of this set up. Does anyone have experience with them? Or is this something I should shy away from? The quad has not been ran in 3 years. A local shop did the work and the guy ended up in jail then rehab and has never called. Now I will have an opportunity to buy the quad or motor. Let me know your thoughts.

I would would not buy it. I have responded to this same question before on this site. Do a search if you want more detailed information on the unavoidable problems associated with this build.

rsss396 · « **Reply #3 on:** April 04, 2014, 11:17:13 AM »

In the end I just dont see you saving any money over a sphynx or puma built with the same crank specs

seanoktm · « **Reply #4 on:** April 04, 2014, 01:43:42 PM »

I would say depends on who built it what rod is on the crank and maybe what kind of riding you will be doing. I have a 395 polonda I bought mine as a whole bike for $2200. Mine is a drag motor I will be running in my trike chassis. For as much as I have in just the motor I couldn't build another drag puma motor. I will not be racing this all the time tho just something for fun that was cheap.

Pumashine · « **Reply #5 on:** April 04, 2014, 04:33:51 PM »

As for any Hybrid, the reliability depends upon the builder who put it together. It may be a lemon or it may be the best bike you had ever ridden. I get the same question about the Pilot cylinder. I purchased a cylinder on ebay and Pete at Hybrid engineering work some magic on it. Besides the Puma it is definitely the best motor I have ever had. It has a 83.5 mm Polaris piston which is very common with the polonda you are referring to.

udontknowme · « **Reply #6 on:** April 04, 2014, 07:15:04 PM »

it may cost more but it doesnt make sense not to look at the cpi jugs. any cylinder with a mono port and no auxillaries is ancient technology. like 1985 ancient

ACampbell · « **Reply #7 on:** April 05, 2014, 03:20:07 AM »

Thank you all for the feedback. I think I'll pass on the bike for now. I'll just run the 330 motor. I'm excited to get my quad up and running for a trip to St. Anthony's in June. Maybe next winter I'll transfer everything to a LRD frame I picked up.

Pumashine · « **Reply #8 on:** April 05, 2014, 09:32:34 AM »

Quote from: ACampbell;30878

Maybe next winter I'll transfer everything to a LRD frame I picked up.

Forgot to mention one thing to you. After all the modification and welding the spacer plate never seemed to seal. My polonda always had a skirt of sand around it by the end of the day.