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Engine Mechanical TopicsDiscussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.
Hey guys, I'm trying to set the timing correctly on this Evo. I have installed a Dynatek S ignition and after following the timing set up instructions provided the bike is still running rough. I have an S&S E carb with an initial basic set up done per S&S. When the bike is running I can hear the timing is off, some white smoke from the exhaust, and when I close the choke she sputters and dies. This is the first start or starts on a complete motor rebuild. Can the timing be adjusted while the motor is running?
Here are the plugs and I'm running rich. Took a camera down the front spark plug hole and have what appears to be a gas/oil mix on top of the piston. The rear is fine.
For starters, what exactly is in the build.. Include everything done and what jetting is in the E carb... Also what plugs are those?
Thanks Hot Rod for answering up. Ok, so this is part of my 1985 FXWG build and this motor was completely rebuilt, cylinders and valve job done by WFO Larry, .010 over on the new pistons. Everything else is stock. The carb is a brand new S&S E which I installed and did not change any of the jets out. I'm using the Dynatek S ignition which I'm following the directions to static time. When doing the static timing I was using the TDC mark on the flywheel and adjusting from there.
First start it was running on the rear cylinder only, stopped and re-static timed. Second time started she was running rough and could hear the timing was still off. Both times I had the enricher **** pulled up all the way and when after 30 seconds I would try and push down the bike would die out.
At this point I'm thinking (1) I still don't have it timed right and (2) It has too much fuel.
Thoughts?
Ride safe!
Last edited by nutsandbolts5212; Feb 27, 2023 at 09:33 AM.
First, Are you running a single for or dual fire ignition?? Make sure that is set properly..
Second, pull the fuel bowl and the intermediate and main jets to see what you have then post up. For a stock Evo a .0295" on the intermediate and a .070" on the main..
Sometimes it also takes a little time for the lifters to truly pump up to make it run smooth which requires you to run it longer but you're going to need to check your jetting first cuz that's extremely rich..
First, Are you running a single for or dual fire ignition?? Make sure that is set properly..
Second, pull the fuel bowl and the intermediate and main jets to see what you have then post up. For a stock Evo a .0295" on the intermediate and a .070" on the main..
Sometimes it also takes a little time for the lifters to truly pump up to make it run smooth which requires you to run it longer but you're going to need to check your jetting first cuz that's extremely rich..
Ok, the Dynatek S is a Dual Fire Ignition. I'm heading out to my shop and I'll pull the bowl on the carb and see what's what. Also, per WFO Larry I installed Johnson HiLift lifters.
Question: Am I not setting the static timing right? Should I use the advance dot just before TDC mark to static time?
Ride safe!!
Last edited by nutsandbolts5212; Feb 27, 2023 at 09:51 AM.
I've never installed the Dyna S, I've always used the 2KI but I still believe that you need to set it on top dead center for front cylinder to probably set the timing.. If you set it on the advance dot then you're going to have way too much ignition timing and it will rattle around..
If the only way you are running it is with the enricher on the plugs will look like that.
On initial start, can you slowly turn off the enricher and increase the throttle to see if the motor can keep an idle say a 1500? If so you need to adjust the idle stop. Also turn off the accelerator pump first.. If it still seems to be running on the rear cylinder only, recheck the pushrod adjustment. They maybe too tight on the front. Did you do anything inside the cam case?
Ok, pulled the carb bowl off and the intermediate jet is .295 and the main jet is .70. I think my timing is off because the amount of fuel left over is not being burnt or burnt properly, hence the carbon on the plug. Here are some close up photos of the plugs.
This is the rear plug. Notice the light grey "line" on top? I believe thats supposed to be at the bend so it's telling me that timing is retarded too much and I should advance right?
This is the front plug. Notice the line is even more on top saying timing is way too retard and needs to be advanced.
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Problem with timing an Evo
