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I don't know man, those go-kart guys really turn them hard. They turn the 440s 8500 on the stock 10-bolt block and when trying to find the limit, the block ate the sheets at 9200. Who knows what these new 460 blocks will take. I don't build them that aggressive so I cannot speak from...

The 69mm Stroker Cranks are In! They are weld & regrindable to at least 72mm Stroke for those crazy guys that need more! 69mm Stroker Crankshaft for GX340/GX390 & 420/440 Clones

Parsons racing sells a 500cc engine thats quite the beast. I would give him a call , I think his are capable of 8000rpm. -Geoff

Seems like we are on the same page :) The forged cranks will be 68mm stroke and available in about 2 months, the billet cranks will be 70mm stroke and are still 6 months out. The billet ones will have remoavble counter-weights .

Thanks for the order Shadowwalker! Boomstick, We have a shipment of 68mm Stroke crankshafts on the way to us now. The reasonably priced 500cc engines are a year or so out. Im working on the CNC program for the billet 70mm cranks, by the time I setup our machine itll be a few months out. -Geoff

1" , Exactly the same as a GX390

There are 2 versions, we have 1 version with a longer deck and another with a shorter deck and a shorter compression height with flat top piston. I think we will end up discontinuing the short deck version and keeping the long deck version once we have aftermarket pistons and long rods for...

Scott, I would be honored to be a part of your project! The 440s are not your average "Chinese" engines, I have spent the last 2 years R&Ding this platform specifically for a performance application. Tons of money has been invested into custom Heavy Duty moulds to improve the block strength to...

HAHAHA, sooo true! Have you seen the newest version that just came out? It has a canted valve hemi-style head with shaft rockers that flows well and supposedly makes impressive power.

Electric Starts are on Backorder, still have some pull starts left... Lots of great upgrades on these next engines.

Wristpin = .788" Compression Height = 1.106" Rod Length = 4.425" Crank Journal Diameter = 1.4175 - 1.4180" Crank Journal Width = 1.1040"

Only 1 electric start left!

Weve got some great pricing on the same parts you are looking into: GX390/440 Performance Parts : Vegas Carts & Performance, Repowering Golf Carts for todays Speed Freaks!

Thank You all for your support!

Don, You arent making it hard on me at all, I get questions about these things all day and Im glad to answer them. In regards to full disclosure, theres nothing about these engines that Iam hiding. They have been around for years, just never made it to the USA. I build them for Golf Carts...

I will measure for you tomorrow. The amount that needed to be removed was very small, Less than 1gram. However, the Parsons rod has a thicker dipper and I did need to remove more material. -Geoff

Don, These engines are no different from the GX390s or 420 Clones. You have to clearance the same way in either engine when using a billet rod. Unfortunately, there is no way around it regardless of the big block engine you use. Single Cylinder engines can only be balanced to a certain RPM, in...

Stang, I will post some inside pics here shortly. You will have to clearance the center of the balance shaft for the oil dipper to pass, you will also have to notch that tab on the rear of the block. I usually pull the balance shaft out and put it to the bench grinder for 10 seconds and...

Yes, they do have balance shafts!

HAHAHA, I guess you could say that. This is my first webstore as Ive been in the distribution business for 10+ years so Im still learning the marketing techniques involved with selling retail. I was planning on ordering some tapered cranks on the next shipment, but I havent looked into it...