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General Category => General Discussion => Topic started by: czakky82 on November 30, 2021, 05:46:34 PM

Title: Asso Pistons
Post by: czakky82 on November 30, 2021, 05:46:34 PM

The only new pistons I can find online for my V7 sport are these old stock Asso pistons.

Does anybody have experience with these?

Title: Re: Asso Pistons
Post by: mtiberio on November 30, 2021, 06:12:29 PM

yes, fine cast pistons. Had some in a used endurance motor I bought from John Hoffman. It was 88x70 for 900 I think. I think one piston ended up disintegrating on the race track in an AMA Pro Twins race (topeka?), but it was being used (abused) well past its expiration date. I wouldn't hesitate to use them in a street bike.

Title: Re: Asso Pistons
Post by: Antietam Classic Cycle on November 30, 2021, 08:25:20 PM

These? https://www.ebay.com/itm/173694313413 If so, the domes are a different shape than the originals and the compression will be higher.

Guzzitech has V7 Sport Gilardoni kits for a good price: https://gtmotocycles.com/products/gilardoni-piston-cylinder-set-82-5mm

Title: Re: Asso Pistons
Post by: czakky82 on December 01, 2021, 03:24:31 AM

Never thought to check with GT. Thanks!

Title: Re: Asso Pistons
Post by: Turin on December 01, 2021, 08:36:46 AM

FYI, all of the old Guzzi pistons I've had my paws on either were stamped ASSO or MONDIAL. 

Would those higher compression pistons be a bad thing? That is quite the dome on those. Nice opportunity to build a hot V7Sport.

Title: Re: Asso Pistons
Post by: czakky82 on December 01, 2021, 02:10:02 PM

I ended up with the gilardoni set. I’m keeping her mostly stock. I don’t know how much power I’d want with drum brake…

Title: Re: Asso Pistons
Post by: moto-uno on December 01, 2021, 05:33:20 PM

  Good point , with the drum brakes  :thumb: . Peter

Title: Re: Asso Pistons
Post by: czakky82 on September 24, 2022, 10:19:45 AM

I ended up buying a set of these with plans to have my original cylinders re-plated.

One problem, the pin to squish band is just under 4mm shorter. Hopefully I can return.

Title: Re: Asso Pistons
Post by: czakky82 on September 27, 2022, 09:32:51 AM

V7 sport wrist pins? Anybody know where these are available?

Mine are okay but would like to find new.

Thanks

Title: Re: Asso Pistons
Post by: Antietam Classic Cycle on September 28, 2022, 08:41:43 AM

Quote from: czakky82 on September 27, 2022, 09:32:51 AM

V7 sport wrist pins? Anybody know where these are available?

Mine are okay but would like to find new.

Thanks

I surfed the web a bit looking for the original part number 1206 1200 and wasn't finding anything. If you look for the later part number 1306 1260 (Eldorado) several sources come up. I'm not sure the length is the same, but the diameter definitely is.

Worst case, there are companies that will make whatever you want.

Title: Re: Asso Pistons
Post by: Don G on September 28, 2022, 04:16:46 PM

Eldo pins are longer, a trip to the lathe will rectify that.....  DonG

Title: Re: Asso Pistons
Post by: czakky82 on September 28, 2022, 07:56:31 PM

Thanks guys, I was going to measure and see….