Jetinetics flywheel + MSD Enhancer?

[McDog]

I'm going to try to set up a Jetinetics flywheel and MSD Enhancer. I've never messed with the timing on a ski before. I've searched through some old threads that say you should advance the timing. Has anyone tried this setup? I think Idok and Freestyleriverrat did and I'm waiting on a PM response from them.

Do I need a special washer for the flywheel? I read something about a washer on an old PWCToday thread.

Any info (or links to info) on how to set up the timing would be awesome.

 

[Mouthfulloflake]

IM not sure where the washer comes in?

you can rotate the ignition pickup mounting plate ( stator plate) a little to retard or advance the timing.

I think the jetnetic flywheels are known for having the magnets in varying locations, or they are simply so strong that they sometimes alter the ignition timing.

make you a flywheel cover witha hole in it, and use a timing light to make sure you dont cook it.

 

[Endo]

The only special washer I know is related to the old kawi's 440/550's. They were notorious for coming lose if you didn't use the stock keeper washer.

 

[McDog]

The only special washer I know is related to the old kawi's 440/550's. They were notorious for coming lose if you didn't use the stock keeper washer.

Come to think of it, that washer info was on a vintage ski thread on the other site.


I do have an extra flywheel cover that I am going to cut. I also have to switch the stator from 62T to 61x since the flywheel I have is 61x. I have an old 61x stator that came as an extra with a ski I bought and sold. I think I'm going to sent it to JSS and have it reworked to make sure it is good.

My main questions have to do with setting the timing. Which wire do I put the light on? Where are the timing marks? Which direction should the mark move to show that it is advanced? How do I measure the degrees? Do I have to do it at different RPM's or just at idle, and let the MSD do the rest? Surely there are others out there that have experience with this setup.

It is interesting that there is nothing about setting timing on the TECH FAQ here or at PWCtoday.

 

[dbrutherford]

If you have any ?? about Jetinetics, give Bob there a call.

I bought my 650 Kaw wheel from them new. In the instructions, it says you have advance the timing 5 degrees. It also came with a plain jane washer, not split types. But the instructions I have mention something about the split washer for a 440/550.

The only thing it says about a Yamaha is that the torque has to be 85 ft-lbs. Then to recheck the torque after 15-20 mins.


Call Bob, better safe than sorry.

 

[Mouthfulloflake]

both plugs fire at the same time, on STOCK ignitions, so it shouldnt matter which wire you connect to.

you will likely have to make your own mark on the flywheel , maybe there is one already, but I have never noticed it?

find top dead center, mark it.
the engine case has markings TDC, and 5 degrees BTDC I think.

print out a degree wheel, and mark the range of 0-30 or whatever you think you are shooting for, and have at it.

it will require some fairly precise measuements, and math I think.

Come to think of it, that washer info was on a vintage ski thread on the other site.


I do have an extra flywheel cover that I am going to cut. I also have to switch the stator from 62T to 61x since the flywheel I have is 61x. I have an old 61x stator that came as an extra with a ski I bought and sold. I think I'm going to sent it to JSS and have it reworked to make sure it is good.

My main questions have to do with setting the timing. Which wire do I put the light on? Where are the timing marks? Which direction should the mark move to show that it is advanced? How do I measure the degrees? Do I have to do it at different RPM's or just at idle, and let the MSD do the rest? Surely there are others out there that have experience with this setup.

It is interesting that there is nothing about setting timing on the TECH FAQ here or at PWCtoday.

 

[McDog]

both plugs fire at the same time, on STOCK ignitions, so it shouldnt matter which wire you connect to.

you will likely have to make your own mark on the flywheel , maybe there is one already, but I have never noticed it?

find top dead center, mark it.
the engine case has markings TDC, and 5 degrees BTDC I think.

print out a degree wheel, and mark the range of 0-30 or whatever you think you are shooting for, and have at it.

it will require some fairly precise measuements, and math I think.

I have no idea what I'm going for other than dependable performance. Where do I find a degree wheel to print out?:1zhelp:

Precise measurements and math? I'm in trouble.:thinking:

 

[Mouthfulloflake]

http://images.google.com/images?hl=en&q=degree+wheel&btnG=Search+Images&gbv=2

 

[McDog]

Thanks man, I should have figured I could google it. How do I find TDC on the flywheel?

 

[McDog]

Freestyleriverrat PM'd me back on the other site and said to set the static timing at zero and let the Enhancer do the rest. I looked at the flywheel again and it has degree marks from 0-35 degrees. I'm guessing this is advanced since they usually recommend advancing 5 degrees. Do I just want the 0 degree mark to be lined up at the very top with each timing light pulse at idle to have static timing set at zero?

 

[parrdaddy]

Static timing comes from where you set your stator, by lining up the arrow on the case with the mark on the stator.

 

[McDog]

I thought the stronger magnets in the flywheel and the different wires in the JSS reworked stator changed the timing, so I would have to check it some how to "zero" it.

 

[RiverRat]

Freestyleriverrat PM'd me back on the other site and said to set the static timing at zero and let the Enhancer do the rest. I looked at the flywheel again and it has degree marks from 0-35 degrees. I'm guessing this is advanced since they usually recommend advancing 5 degrees. Do I just want the 0 degree mark to be lined up at the very top with each timing light pulse at idle to have static timing set at zero?

You want to do the adjust the stator accordingly to compensate for the higher powered magnets. That should get you to a static timing equivilent to the zero mark. Once at that point the MSD should work as designed.

 

[Mouthfulloflake]

was it the Jetnetic, or the Rad that had the odd timing issues that I remember reading about?
IM wondering now, my memory is SHOT.


BUt yeah, Follow Rats advice, you want to figure out accurately where its firing.

 

[Idok]

without a timing light, setting the stator to the stock setting is your best bet.....

I have had TWO pro motor builders on this site recommend a timing light with that flywheel




with that flywheel make sure to retorque it after a couple of rides.....otherwise it'll work itself loose (RAD's are even worse with their aluminum hub) and shred EVERYTHING inside the front cover

 

[yamanube]

with that flywheel make sure to retorque it after a couple of rides.....otherwise it'll work itself loose (RAD's are even worse with their aluminum hub) and shred EVERYTHING inside the front cover

Do you mean tighten it every couple of rides or just after the initial couple rides?

 

[RMBC Freeride]

I am running this exact setup in one of my engines: Jetinetics 61x flywheel (steel hub), JSS reworked 61x stator and a MSD enhancer. Works great!

I set my timing with a timing light as best I could. I found it very hard to do without the pump in the water - the vibration and high idle/no load make it hard to see the initial timing at or near idle. Keep in mind you will need a good digital tach as well to keep an eye on the RPM's

I have specs at home, I will have to look for them. But mine is on a 5mm stroker, so it might not be right for mcdog's setup

 

[dbrutherford]

yes after the first ride, retorque it. I never torqued min since I didn't have a way to hold the flywheel. I tightened it down with an impact gun and it never came loose.

but... Even though I compensated for the magnets by advancing my stator, I melted down two top ends... the first one was with way lean jetting. The second was way rich jetting. Concidence to the flywheel, I don't know...

 

[Mouthfulloflake]

Just out of curiosity, how you do you melt a top end with too rich jetting?

 

[McDog]

Freestyleriverrat PM'd me back on the other site and said to set the static timing at zero and let the Enhancer do the rest. I looked at the flywheel again and it has degree marks from 0-35 degrees. I'm guessing this is advanced since they usually recommend advancing 5 degrees. Do I just want the 0 degree mark to be lined up at the very top with each timing light pulse at idle to have static timing set at zero?

Will someone answer the bold and underlined question please?