Author Topic: pumashine's ftz cylinder (Read 22921 times)

patman13mia · « **Reply #75 on:** June 07, 2014, 04:33:39 PM »

also by the sounds of it my cylinder should be here before the dune trip. neil said it just needs bored and then im ready to ride!! man i cant wait!! ready to see what the difference in power is from stock to 350

Pumashine · « **Reply #76 on:** June 07, 2014, 04:58:46 PM »

Quote from: patman13mia;35953

ready to see what the difference in power is from stock to 350

LOL, You will be wondering why you did not do it 10 years ago. The bottom end torque is amazing.

patman13mia · « **Reply #77 on:** June 07, 2014, 06:00:46 PM »

hell yea!! ill just keep moving up in dispacement as i go!! get some big boys like you got

patman13mia · « **Reply #78 on:** June 19, 2014, 04:43:06 PM »

check out the base gasket... i would say this wont hold a seal lol.

Pumashine · « **Reply #79 on:** June 19, 2014, 05:48:54 PM »

Quote from: patman13mia;37125

check out the base gasket... i would say this wont hold a seal lol.

Better put some sealer on there this time.

udontknowme · « **Reply #80 on:** June 19, 2014, 10:21:13 PM »

pat i hope you dont mind some constructive critisizem. them wiseco cranks and rods have a high failure rate. a piston with the forward facing side cutouts often times create a undesirable shortcut from the exh to crankcase. even with just a rearward facing cutout i still dont think its a good thing because it leaves a large gap between piston and cylinder wall at bdc. a full circle piston would be best but alot of times they dont make that style for a particular engine so were are forced to use alternatives with less than ideal designs

patman13mia · « **Reply #81 on:** June 19, 2014, 11:09:38 PM »

what piston fo you use when you build your 250r's??

udontknowme · « **Reply #82 on:** June 20, 2014, 01:12:06 AM »

i would be more concearned about that rod. if the crank is a wiseco i would have concearns about that also. when they break its a train wreck. i hope your one of the few that dont have problems

im not familiar with all the different 250r styles of pistons so i cant answer your question directly. maybe someone else around here can ? to me that looks like a old version of a wiseco. why they ever designed them like that is a mystery to me. years ago the cr500 piston looked the same and probly many other pistons. a light bulb must of went off and they realized the errors and corrected it partially with the cutout only on the back half. still i think its best to not have any side cutouts but often times you dont have a choice depending on what engine your dealing with.

these arent necesarrily for your engine but i think something like one of these designs would be a better choice if you have the option.

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