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Group K did have a rough maintenance schedule relative to Piston Speeds: 4000+ fpm – Completely unpredictable life span of crankshaft components 3700 fpm – Crank life can predictably be 20-35 hours 3500 fpm – Crank life can predictably be a full season of use 3300 fpm – Crank life is...

Houston

Was the Check drawn on your Account? :D

1993 YAMAHA 1100 BLASTER 1 in Excellent Running Condition 93 Yamaha Blaster 1 with Kawasaki 1100 93 Octane Pump Gas Limited Engine. Billet Aluminum Cylinder Head by Cool Head ($350). Compression 125 psi even on all three Cylinders. Triple Aftermarket Mikuni SBN Racing 44mm Carburetors ($600)...

Probably because the Carburetor Throttle Plates and Shaft Bushings are worn allowing more Air to pass at Idle and Low Throttle, thus requiring more Fuel...

If the Pre-Mix had the right amount of Oil, then either Water washed away the Oil lubricating/coating the Pistons or the Carbs settings were lean or there's an Air Leak somewhere. Once the Rings seized or stuck flush inside the Ring Groove, the Cylinder lost compression, because the Rings...

Looks like Water intrusion or Lack of Oil on bofth Pistons. The blow-by came later after the Rings seized. Have new ProX Pistons for the rebuild at just $100 each : https://www.x-h2o.com/threads/prox-pistons-for-yamaha-700-1100-100-ea-plus-shipping.208134/#post-2134537

Did you know that Mangoes are a close relative of Poison Ivy? Ax me how I know...

Just another Big Fish story :D You shoulda' axed for the Head Nurse o_O Chinese Doctor would have said "Don't worry, eee falloff" :oops:

Austen15 From Loveland Colorado Joined Dec 26, 2011 Last seen Oct 7, 2021

BIGMIKE 33 · From jupiter FL Joined Jul 22, 2018 Last seen Oct 21, 2020

USPS Ground Shipping CONUS for : 1 Piston Kit $10 2 Piston Kits $13 3 Piston Kits $17 A month ago, paid $11 bucks just to ship an MSD Stator Plate...

Great Grate for racing buoys :p

Save Money and save your riding season with quality Pistons on hand

Was that a Tongue-in-Cheek comment? :p

For Sheet Metal bending: https://www.gasparini.com/en/bend-deduction-and-flat-length-calculator/

You're gonna need these...;)

New never-used +1mm ProX Piston Kits. These Prox Kits retail for $140 each plus shipping. Selling for $100 per Kit plus shipping or all 5 Piston Kits for $525 Shipped CONUS. A $200 savings! Note: Two of the Piston Kits are missing the Circlips which can be bought at Blowsion for $4 per set.

Have a fully functional and rideable 91 650 SN complete minus the Engine, Battery and Ebox. Just drop in your Engine/Battery/Ebox and go. Comes with AC Racing Aluminum Pole and OEM 650 Parts. Skat Trak 13/16 Impeller. A/M Intake Grate and Ride Plate. Repaired Fiberglass 650 Waterbox fully...

Like new, only used once, hard to find in stock WCOT SJ2R Intake Grate for 2-Stroke 2008+ SuperJet. These are sold for $300 bucks on eBay. Yours for $225 shipped CONUS.