First off, bravo for the Evo forum. Still only 1-page but I bet it'll grow. Got my '98 Heritage in July. Yup, love the simple technology, its just like a big lawnmower engine. Looked at the new ones and decided on pre-twin cam. Besides, I think the Evo's sound better! I have a question about warm up. Just how long? It's getting cold in the North East and she's spitting, coughing, and farting like crazy (the bike not the wife). Normal procedure is to start with enricher and let idle until I get the helmet, gloves, and glasses on, about 5-minutes or less. I then leave the enricher pulled out for about 3-miles. She doesn't seem to run smooth for about 15-minutes or more at moderate, not highway, speeds. Thanks guys!

 

Most times with a carb bike you will need to adjust the fuel screw to help out in the colder air. You did not say too much about what the bike has done to it but a 45 pilot jet will help out nicley for a basic stock engine with pipes and a A/C 1.5 turns out should get in the ball park.

Warm up wise as long as you have good heat on the cylinders you are good to go.

 

'Most' EVO owners will tell you to let the motor warm up until the rocker boxes are warm to touch. Then 'others' will tell you to just start it and ride it easy for the first few miles. There are two issues:

First the CV carb is jetted very lean to meet EPA requirements. That's why the 'choke' is actually a fuel enrichener not a choke. The first thing that most people did was to pry out the aluminum plug that covered the idle mixture screw so it could be adjusted to eliminate the 'EVO Cough'. The CV carb is a decent item when you take the time to tune it for your combo. And it seems that everyone has their favorite 'tricks' when it comes to doing just that.

Second the EVO's are prone to leaking around the cylinder base gaskets. Mostly around the rear cylinder. 'A lot' of EVO owners believe that by allowing the motor to warm up before putting any additional stress on it, the gaskets won't leak. There is some validity to this. But the real reason that the EVO's leak around the base gaskets is that the oil return passageway merely 'aligns' between the cylinder and the engine case. Oil pools in the area of the gasket, and because the cylinders and crankcase expand at different rates, you guessed it...The oil seeps out. Had The MoCo installed a hollow dowel that would funnel the oil past the gasket instead of allowing it to pool, a lot fewer EVO's would have went back to the dealers for repairs. My EVO leaked for thirteen years before I had 'The' Oil Fix installed.

If you decide to enhance the preformance of the bike, I'd recommend: Air Cleaner, Exhaust, Cam, Ignition, dyno tune the carb.
My EVO has the SE air cleaner, SuperTrapp slip-ons (18 discs), Andrews EV27 cam, Dyna 2000 ignition, and mild porting of the heads. Still working on a good tune, but last dyno was 75/82. There is no comparison between how it runs with the mods, and when it was stock.

 

Tucker, Probably no two people warm it up the same, here's what I do.

Pull enricher out full, crank and let it run for about 2 minutes. Push enricher to half open for about another minute. I then push the enricher in. If the motor is trying to die, pull the enricher back out to a point that it is not lugging. Push it in again. When it idles smoothly with the **** in, I'm ready to go. (Tougher after a few beers)

Two things I think are not good is to leave the enricher out too long and using the throttle lock instead of the enricher. Either one of those will give ya a fouled plug.

 

Pretty much how I do it.

 

I start mine up useing the enrichener,then when it is started I push the enrichener in about halfway,let bike run for approx. 30 seconds then ride off,adjusting the enrichener as I ride along until it idles without the enrichener.I run my bike a little on the rich side and havedrilled out the pilot jet to a size to suit.60,000 on this EVO and no oil leaks here and mine is a 93 model

[IMG]local://upfiles/7663/3966239D308045FB95C6D81D9195267C.jpg[/IMG]

 

Never use the enricher here in FL. Not a choke and tends to foul the plugs. I just give the scoot a coupla good twists, hit the starter and tighten up the trottle lock to keep her idling at about 1200 for a couple of minutes till she is toasty.

 

That's basically how I use my enricher, but I only use it if the outside temps are below 50 deg.

 

Enricher should not be open for more than a minute.Your fouling out your plugs.
Change your plugs first off.When you start the bike,enricher out all the way.After about a minute,push the enricher in & give a little gas thru the throttle.Lock the throttle at about 1000rpms for 2 to 4 minutes & ride.No more fouling plugs.Been there done that

 

Enricher should not be open for more than a minute.Your fouling out your plugs.
Change your plugs first off.When you start the bike,enricher out all the way.After about a minute,push the enricher in & give a little gas thru the throttle.Lock the throttle at about 1000rpms for 2 to 4 minutes & ride.No more fouling plugs.Been there done that


This is the procedure I use...