EX440 drag minibike

[bruce bruce]

I just picked up a 1976 EX440 motor and was wondering who was the "guy" for performance mods. The motor will be in a drag minibike so I have allot of questions.

 

[xfaexciter80]

Ex 440 yamaha? I know some stuff for it

 

[bruce bruce]

I'm looking for someone for porting and head mod to get compression up. Going to run MRD mechanical fuel injection from a watercraft on methanol.

 

[bruce bruce]

Here's what it's going in...well something like this.

 

[bruce bruce]

Are there any other snowmobile sites that are more for modded older yamaha sleds?

 

[bruce bruce]

MRD injection.

 

[toydoc]

IMO, for what your doing, I would go with Dan Hull A&S Racing.

Or for good Exciter motor mods, Doug Flannery

 

[bruce bruce]

IMO, for what your doing, I would go with Dan Hull A&S Racing.

Or for good Exciter motor mods, Doug Flannery

I know who Dan at A&S is but does Doug have a shop or website? Thanks, Bruce.

 

[bruce bruce]

I also heard of a guy with the last name Koch?

 

[xfaexciter80]

I took cylinders off of a phazer and put them on a 440 case works great lots more power and with fuel Injection it would tune in way fast

 

[xfaexciter80]

Also I know of some other mods that can really help out.custom pipes And reed spacers I would love tox know where you got the fuel injection.

 

[toydoc]

I know who Dan at A&S is but does Doug have a shop or website? Thanks, Bruce.

If your making a methanol motor, I'd go with someone who has done lots of them, that's more Dan IMO.

Doug has a shop 269-792-0070

What about Ross Liberty out your way? He may not know Exciter motors but he can make some real smoke from alot of motors

 

[bruce bruce]

If your making a methanol motor, I'd go with someone who has done lots of them, that's more Dan IMO.

Doug has a shop 269-792-0070

What about Ross Liberty out your way? He may not know Exciter motors but he can make some real smoke from alot of motors

I have a guy that does allot of banshee motors and used to put these Yamaha motors in golf carts. I think the clutch will be the next thing I need to do home work on. Comet 102c I think is what I'm hearing. Thanks for the help toydoc .

 

[toydoc]

We raced alot of Jet-skis and Ross Liberty stuff was the best. His pipes would kill anything around. IMO, it would be worth a call anyway, he's in your back yard.
Factory Pipe 707-463-1322

What clutch to use is wide open for you. I'd pick one that your sled buddys has lots of tunning parts for it. I'd run a Arctic Cat driven. They work real well, cheap and cheap to tune. I don't know if your going to find much help for setup because of what your putting it on. I'd put the bike on a ATV dyno and tune the clutching.