Swampdonkey87

2 hours ago, jeepwm69 said:

 

if you don't mind grinding your case halves out a little, I'd look at either Honda East Toledo or Rocky Mountain ATV.  You're not scared to split cases are you? 

 

The Reduction Boss is plug and play, but were it me I'd grind the cases.  That way if you ever need to replace the whole jug your cases will readily take an off-the-shelf 520 jug from Honda.

splitting this case as soon as the flywheel puller bolt gets here, the ol apply pressure to the back of the flywheel and tap bolt head with socket on it trick doesn’t seem to work on these. Going to clean the screen and inside crankcase. More pics coming. And yeah I don’t mind grinding the cases I have a  Fordom flex shaft grinder should do whatever needs to be clearanced.

Man this $200 bottom end has yet to disappoint. It’s literally in perfect shape.

1 hour ago, jeepwm69 said:

What gear reduction are you running?

I have 35% not sure of who it came from. Im debating not running it with deestones that measure right at 27” I’m thinking after all the performance mods the factory gear set with epi stall springs would be a good match. What are your opinions on that?

1 hour ago, jeepwm69 said:

Do the 520 top end.  It requires a little case grinding to fit, but now's the time to do it.  You can also order a bolt on 520 from Reduction Boss (they turn down the outside of the cylinder a hair so it will fit in stock cases)

 

The 500 (which is actually a 475) wasn't worth it.  I went that route with the wife's 420 and was really, really disappointed in the results.  Used with a Weisco programmer, kept the stock exhaust (which is the same as the factory 500 exhaust so I know it will breathe well enough).

 

With the 520 you're picking up a 100cc's.  The 475 you're only picking up 55. 

 

Cost is about the same.

cool, who has the best price on a 520 top end?

The 2009 es bottom end case boss that the manual shift rod slides thru has to be ground down to clearance the rod so flywheel side case will bolt down. 
 

here are some pics showing difference in flywheels. Just waiting on puller in the mail.

going to shave the flywheel key .060 for ~4 degrees timing advance. 500 top end and tb. Also welded up a custom exhaust. Going to get power commander and epi stall springs also. Also going to mill the head as far as I can.

Trying to find a forum that’s halfway active. Pics and details to follow.

here is basically what I’m doing:

paid $200 2009 es bottom end that is mint. Cheaper than replacing the crank in my 14fm

Using ‘14 foot shift rod, foot shift case covers(flywheel and clutch) using 14 flywheel and stator.  
 

write up and pics will be below.