Wow! A variable compression engine! Cutting edge tech!
I feel your pain, Brother...
Dale - where are you at? Maine? Florida? Orygun?
These folks are in the USA and may have some insight on crank rebuilding/replacement. Worth contacting. (
https://westerncyclesupply.com/ )
Mr. Price at PricePart has complete needle bearing cranks ready to go for £375/$500 USD, plus probably another $100 for shipping & core charge. That's what I'd do. It's a standard Bullet bolt-up crank with Price's needle bearing con rod. Needle bearings
really like clean oil, but they don't need much of it. Two stroke tech!
https://www.pricepartmotorcycles.co.uk/ourshop/prod_2986111-144693sx-needle-crankshaft-500cc.htmlhttps://www.pricepartmotorcycles.co.uk/ourshop/cat_314445-Crankshaft-Bearings-Connecting-Rods.htmlHitchcocks has a line of premium crankshafts for £1050/$1400 USD, if you are going to build a performance motor that's the ticket; might as well go with the 570cc stroker if you're pulling a sidehack - same cost.
https://accessories.hitchcocksmotorcycles.com/accessory-shop/LONG-STROKE-CRANKSHAFTS/3281PART No. 200160A ; CRANKSHAFT, LONG STROKE, INDIAN 500cc kick+electric start models ; £1,050.00
As with our other UK crankshafts these are a race proven all English-made crankshaft (NOT a reworked Indian made crank), which uses our own competition designed forged steel connecting rod. The crankpin has a far larger diameter than the standard big end or RE13 roller version. It is a press fit into the flywheels and therefore, will not work loose as can happen on the original assembly. It uses a steel needle caged bearing. The flywheels are precision engineered from high quality steel billets with ground bores for the crankpin and main shafts. Designed with both the enthusiast and racer in mind.
570cc CRANKSHAFT: Designed for the 500cc Indian built Bullets the new stroke of this crankshaft is 103mm (Standard is 90mm), giving a new engine size of 570cc or 612cc, if used in conjunction with our 87mm forged piston (part no.: 90020). On most models this should require no modification to the crankcase, but this should be checked as crankcases can vary. With our forged piston and the fitting of a 3mm compression plate, it will give approximately 8.5:1 compression ratio. ( The stroker with a 84mm 6.5/1 forged slug makes about 7/1 CR, good for hack use. - ACR -)The OILING system needs careful checking - there is a reason the crank bearings died. The rod didn't break, the piston didn't drop a skirt, the rod failed. Oiling is the obvious culprit. Could be something easy like the Worm Seal died, or the pump discs may be shot. All that stuff can be rebuilt.
( In retrospect, it's also possible that the crankpin nuts came adrift. In any event the cases need to come apart. Remember - "There's no substitute for cubic dollars!"
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