Скачать с ютуб EZGO Golf Cart TXT modified 2 stroke from older EZGO Marathon в хорошем качестве

EZGO Golf Cart TXT modified 2 stroke from older EZGO Marathon

I came across 2 broken down worn out missing tons of parts and the newer ezgo txt model which has the better rear end with forward N and reverse along with a simpler 2 piece plastic body is what I choose to build off of. The previous owner made a sad attempt to build a disaster of a home brew lift kit and an even worse attempt to fit a twin cylinder old sled engine in the chassis of this poor 1998 TXT! Along with the 98 EZGO I picked up I also got another older model from 1989 which was a totally different set up suspension wise, engine, rear end and steering are all different in many ways, but being both were ezgo's and I'm a metal fabricator I didn't have any doubts I could make something work out of both these hopeless scrap piles of junk! I know I wanted a 2 stroke so after finding out that the 89s engine was made by Fuji Industrial and shared may parts with older Polaris sled engines of the same displacement 244cc like the Polaris colt from 76-81 I had plans to build an EZGO engine modified with Polaris parts to take it from its sad 11hp to well over 25hp and still having a bolt in engine that fits a stock marathon or modified txt and can utilize parts from either company EZGO or Polaris. So I built a new engine support or mounting system shown in the pictures to start made a proper lift kit welded new mounts to the axle tubes and flipped the rear to the outside of the leaf springs. Ended up using a front axle assembly from the marathon cart because sadly the damage done along with missing a ton parts when the previous person attempted to create a sad example of a drop front axle ugh! Getting back to the engine, I'm a professional engine builder on the side since age 12 and worked in machine shops over the years and now an engineer for a living, but I still have a need to get my hands dirty!!! So yeah the engine..... The original 244 crank was like new somehow meanwhile the top end was wasted so the only internals reused was the crank and block itself. New EZGO cylinder I choose for durability being solid case iron but you can use a jug off a 244 or a one from a twin cylinder Polaris 488cc which have slightly larger ports but definitely much more port timing. I preferred to keep this one on the mild side and more for bottom end torque rather than a high rpm hp range engine. The induction system is the stock reeds and cage with a custom made intake system and 28mm flat slide carb as opposed to the stock carb with barely a 10-12mm venturi, very sad! The exhaust system is comprised of a mix of 98 Kawasaki KX 250 expansion pipe and a cut down factory EZGO Nelson muffler for a silencer at the end of the expansion pipe. Of course a good bit of cutting and fitting the expansion pipe was needed to make fit perfectly but definitely well worth the effort in the end for power throughout the RPM range. The primary clutch was already for a 2 stroke EZGO but it still needed help to work the way I wanted it and have a higher stall speed, this was accomplished by a digital micro scale and removing weight off the 3 internal weights, I believe I ended up settling @ 36 grams which is the weight the Polaris colt used in the sled clutch. The last thing I changed was the cylinder head, found a 20 dollar 1979 Polaris Colt head on eBay cleaned it all up and added extra air holes in the fins nearer the exhaust side to allow more air movement on the hotter side. But it raised the compression by nearly 30 PSI going from 120psi with an all new cylinder piston and rings to almost 160+ PSI just by swapping out the head! Not to mention a much better combustion chamber shape and a squish area that exists on the colt head meaning a bit more power where the EZGO head was a poor example made to run on garbage gas and low compression was also for a little more longevity they claim by less sidewall and ring wear at a lower ratio. Oh and one last thing the EZGO marathon had no reverse in the rear differential so the 2 stroke was built to run forwards and backwards to become reverse. So being I had no use for running this engine backwards I removed the reverse cam on the pick up ring under the flywheel. It makes for longer coil life and a hotter spark! The reverse spark is always firing while the engines running forwards and vice versa! So it was a waste of electricity to fire the plug again after it already just did! The ignition timing on the EZGO is fully adjustable also so I set the timing to a conservative 20 degrees BTDC I believe the Colt In certain years called for 18-20 degrees also, so it definitely gave the engine it's needed bottom end power back and some decent throttle response too now! Overall it goes 36-40 mph now with the 20 inch tires on the back of course an even taller tire equals more speed. But to be quiet honest with everyone here on YouTube at 20-25 mph on a leaf sprung front and rear suspension 25 is really all that I feel comfortable with but it's nice to be able to spin tires when needed!! Thanks for looking!