540 big bore question

goneboilermakin · Post by **goneboilermakin** » Fri Feb 27, 2009 7:17 pm

Have a set of 77mm cyls for my 83 540, looking for a set of pistons

goneboilermakin · Post by **goneboilermakin** » Fri Feb 27, 2009 10:59 pm

Trying to figure out what size carbs they are, the ID of the motor side of the carbs is 44mm, would that make them 44s?

mrviper700 · Post by **mrviper700** » Sat Feb 28, 2009 12:16 am

yep, 44m carbs then, thats where they are measured

any chance 1 of the parts sled has good ski tip rubbers on them youd like to sell?

goneboilermakin · Post by **goneboilermakin** » Sat Feb 28, 2009 12:29 am

Sorry the other sled didn't even have ski loops on it

goneboilermakin · Post by **goneboilermakin** » Sun Mar 01, 2009 10:38 am

Anyone?

sxr1000 · Post by **sxr1000** » Sun Mar 01, 2009 11:33 am

I tried to find a set of pistons last year for the same project,I found out that weisco made some back in the day and some companys hade pistons made in England and there are none to be had,your best bet would be to call weisco and see wht it would take for them to make a batch.

goneboilermakin · Post by **goneboilermakin** » Sun Mar 01, 2009 11:57 am

Yeah im going to call wiseco on monday, it came with a set of junk pistons from venolia, they say venolia alcoa 287 so im going to give them a call tommorrow see what they have, it has a single ring set up which seems kind of odd

goneboilermakin · Post by **goneboilermakin** » Mon Mar 02, 2009 10:58 am

No luck with wiseco, hauck or bender, im going to take some measurements and see if I can't find a piston from another sled that will fit

Post by **Vmax540** » Mon Mar 02, 2009 1:18 pm

Maybe if you get ahold of this seller in this auction, he may be able to help ?

http://cgi.ebay.com/ebaymotors/yamaha-v ... ccessories

For sale is a brand new wiseco piston for yamaha snowmobiles. Wiseco part number is 2304p2. Kit is new, and removed from the box only for pictures. Kit includes everything pictured, piston, circlips, and rings. Kit is missing the piston pin. Piston size is .020 over, and fits yamaha vmax 540 from 1983-1989. Kit retails for 108.99

goneboilermakin · Post by **goneboilermakin** » Mon Mar 02, 2009 4:16 pm

Thanks but I already called wiseco, .020 over is about 8 times less than what I need haha, I believe 4mm is like .160 over or something like that, I've been up and down the web all night and day and all I can come up with is this venolia place that sells car pistons, haven't had a chance to talk to anyone yet, thanks again

goneboilermakin · Post by **goneboilermakin** » Mon Mar 02, 2009 5:23 pm

Talked to venolia piston a few minutes ago and they can have them made for 125 a piece, im going to try and get a set in the next month or so , so I can grass drag the hell out of it this fall haha

vmax-540 · Post by **vmax-540** » Mon Mar 02, 2009 5:37 pm

Give Starting Line Products a call as they made and sold those big bore kits . They said that they made 103 HP and called them 600 cc big bore kits.

crwdog · Post by **crwdog** » Wed Mar 04, 2009 12:00 am

i though I had a line on a complete 'big bore kit" but I could never get the seller to commit. If you order pistons, get ahold of me. I am very intrested

Thanks
Monty

modsingle · Post by **modsingle** » Fri Sep 04, 2009 12:25 pm

Any update on the pistons for the big bore kit???

MOD STOCK 4 81 SRX · Post by **MOD STOCK 4 81 SRX** » Sun Sep 06, 2009 9:30 am

How was Venola to talk too I need pistons for my 82 srx 500 and am not runnig wiesco crap.