89 Exciter Transformation!

[ramblnman]

Try Polaris 10al weights and a the stiffer of the two comet purple springs. Should work well

i was thinking gold spring but that does not sound bad either

 

[Lasse]

1. Flatslides are the way to go on these Exciters.
The result is instant excelleration with the flatslides.

2. But what really woke this sled up was using the 95+96 primary/secondary clutches!

1. Yes , the TM carburetors works good on the Exciter engine....
...But putting UFO's on the stock VM-38 carburetors also working great and is a much cheaper solution.

2. Yes , using the V-Max 95/96 secondary clutch is a very good choice.
In the primary use the Exciter-II YXR clutch or Comet 108 EXP


If using Comet primary clutch,
remember to use Polaris clutch weights.
Polaris weight profiles are the most efficient at transferring power.

 

[stanage]

Has ne1 ever changed the crank seals on an exciter themselves? Can I change the MAG side without ripping the cases apart?

 

[stanage]

Has ne1 ever changed the crank seals on an exciter themselves? Can I change the MAG side without ripping the cases apart?

Nevermind, did a search and found my answer... Ordering a gasket set and splitting the engine... Screw that noise, Im changing the crank seals...

I don't have a leak down tester, nor do I know ne1 who does. And since the mag side seems to be spewing spooge out the exhaust I figure that side is just acting like an air pump, and not really burning right... And since the rebuild back when I found the melted piston, I hadn't changed any of those seals...

Im going to attempt to start the machine without the recoil starter(just a pull cord) to see if I can get some starter fluid on the mag seal to see if the RPM's change... that way I have some sort of confirmation...

 

[Lasse]

Polaris 10-series clutch weights...

The info I have in my archives from my first Exciter with PSI single pipe are as follows:

I never ran nothing but Yamaha clutches but have info on Comet set up
* Polaris Pink spring. ​

* Polaris 10A weights.

I believe you have too light of weight..

the 10A polaris weights for the pipe setup shows that they weigh 58 grams..
I would put the 58 gram weights to er...

Try Polaris 10AL weights and a the stiffer of the two Comet purple springs. Should work well

Just to clarify things......

Polaris 10-series clutch weight chart....

Polaris Part # , Code , Weight

* 1321530 , 10-MR , 44.00 gram​

* 1321527 , 10-MW , 46.00 gram​

* 1321529 , 10-MB , 47,50 gram​

* 1321528 , 10-M , 49.50 gram​

* 1321526 , 10 , 51.50 gram​

* 1321531 , 10-AL , 53.00 gram​

* 1321685 , 10-54 , 54.00 gram​

* 1321589 , 10-A , 55.00 gram​

* 1321684 , 10-56 , 56.00 gram​

* 1321588 , 10-58 , 58.00 gram​

* 1321587 , 10-60 , 60.00 gram​

* 1321586 , 10-62 , 62.00 gram​

* 1321585 , 10-64 , 64.00 gram​

* 1321584 , 10-66 , 66.00 gram​

​

 

[stanage]

[/left]

Just to clarify things......

Polaris 10-series clutch weight chart.​

Polaris Part # , Code , Weight

* 1321530 , 10MR , 43.50 gram​

* 1321527 , 10/46 , 46.50 gram​

* 1321528 , 10M5 , 49.00 gram​

* 1321526 , 10 / 10A , 51.50 gram​

* 1321531 , 10AL , 53.00 gram​

* 1321685 , 10/54 , 54.00 gram​

* 1321684 , 10/56 , 55.50 gram​

* 1321588 , 10/58 , 58.50 gram​

* 1321587 , 10/60 , 60.50 gram​

* 1321586 , 10/62 , 62.50 gram​

* 1321585 , 10/64 , 64.50 gram​

* 1321584 , 10/66 , 66.50 gram​

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I slapped those in, and although I gained 15km/h, I lost around 500 rpm at WOT, down to around 6000RPM now. Now Im no longer at peak power in my straight shift. Ugh... Engagement RPM is still the same... it's almost as if I need less weight and a weaker spring, so that I shift out completely.

Im under the impression since my mag side is not working right, I don't have enough power out of one cylinder to create enough centrifugal force to fully expand the primary clutch...​

 

[ramblnman]

your choke plunger isnt hanging up on that side is it

 

[stanage]

VIDEO of my clutch in action.

A1 48.5 gram weights, Red Spring, secondary clutch at A2 I believe. Black and pink spring in the secondary. Brand new 89L belt, 2 shims in the secondary so the belt rides a tad bit high.

 

[stanage]

your choke plunger isnt hanging up on that side is it

It didn't look scored or dirty at all when I was taking it off to change the jetting this weekend. Why in the heck would the piston be clean as a whistle on that side? Im going out to the garage to see if that seal leaks...

 

[ramblnman]

sounds really rich!

 

[ramblnman]

ok..your rpm's are low even though the weight/spring in the primary dont overcome the secondary tension! looks/sounds like a runnability issue.. too light of weight in primary should have the engine screaming! has a dull/flat tone that would indicate a rich mixture

 

[stanage]

I decided to do a bit of trouble shooting tonight.

Compression is 110 cold
All my resistances in the manual check out except the secondary ignition coil. Primary ignition coils reads fine. Secondary reads OPEN! I even took off the plug boots and tested the wire, and it tested open to the red wire.

I'm going to bring the coil inside the house and test it later.

Spraying break cleaner all over the mag seal, carb boots and base gaskets produced no audible increase in rpm.

I ran the sled with the PTO plug cap off, the cylinder that I suspect is lean ran great!? Ran it on th other cylinder and it ran the same as the other... Weird... I'm thinking less of a lean crank seal than a high speed coil?!?!

 

[stanage]

I think this says it all......

 

[stanage]

I've got a replacement coil on order from Yamaha, should be here tmrw! I'll test the ohms on it and then put it on the machine to see what it does. Fingers crossed!!

I also ordered another 45 pilot, to that boths carbs at jetted the same with regards to pilot jet. The 42,5 works well in warmer weather, but as soon as I put the 45 pilot the machine wakes up big time in the bottom end.

AND THEN, I'll get back to my clutching and gearing!

THANKS FOR ALL THE HELP GUYS!!! I COULDN'T DO IT WITH ALL YOUR SUPPORT AND KNOWLEDGE! REST ASSURED I READ EVERYTHING YOU GUYS HAVE PUT DOWN IN MY THREAD, AND THE EXCITER KNOWLEDGE 101 THREAD.

There's a lot of info to take in, and Im trying to make 1 change at a time so I can better understand the changes Im making. I understand I have a lot of clutch testing to do(springs and weights) but I had to figure out my speed issue first... something just isnt right... hopefully the coil fixes that. I've never seen an engine where 1 plug is clean, and the other brown... baffling to say the least.

 

[Lasse]

Well, I'm out here testing. I took the hood off, so I could see the clutches.
They arent shiftng out all the way.
Belt isn't climbing in the primary, or going down the secondary.
I was also thinking of throwing in a blue primary spring and 58 gram weights.

Ok, so I put the 58 gram weights,
Maximum revs at WOT: 6000 Rpm.
I need more RPM's to reach my peak power...
And man do I ever wish I had my 16/33 gears.

58 gram weights are way to heavy for the Exciter engine !!

Polaris 10A weights weighing 58 grams.

WRONG , The Polaris 10A does not weigh 58 gram !

- - - - - - - - -

Stanage:
Useless to spend job and time on testing the clutch set up more before you got your 16/33 gears and got your engine running right !

 

[Lasse]

I now down to around 6000 RPM at WOT.
It's almost as if I need less weight and a weaker spring,
so that I shift out completely.

I am under the impression I don't have enough power to create enough centrifugal force to fully expand the primary clutch.

I took the hood off, so I could see the clutches.
They arent shiftng out all the way.
Belt isn't climbing in the primary, or going down the secondary.

I need more RPM's to reach my peak power !

Here are some clutching basic :

 

[ramblnman]

the info i have in my archives from my first exciter with porting/psi single pipe are as follows
pilot 42.5
airscrew 1 turn
stock slide cutaway 3.0
nozzle Q6
needle updated "82"
below15 degrees 4th clip pos
above 15 degrees 3rd clip pos
330 mj both carbs
blocked off powerjets

i never ran nothing but yamaha clutches but have info on comet set up
polaris pink spring
polaris 10A weights with 3 grams added
2 additional grams are needed if you are using the arms that came with the comet for your sled with psi pipe.
hope this helps!!

never said 10a polaris weighed 58 grams... if you read my recommendations it is self explanitary,it says with 3 grams added per psi instructions especially when the 48 gram weights he had in there were not overcoming the secondary, at the time i did not know there was a runnability problem until he posted the true r's it was turning and the vid of his sled i only posted this info based on my psi info that by the way i gave nicolai way back when he posted for all to see.. which i had lots of money and time in my first sled and dont mind sharing to try to help out people

 

[ramblnman]

58 gram weights are way to heavy for the Exciter engine !!........ not according to the experts at psi but i never ran nothing but yamaha quality products..i am pro yamaha !!! certainly would never run comet stuff or polaris stuff on my beautiful yamaha's

 

[stanage]

Lasse, ramblnman, you guys are awesome. Once I get the new coil were doing some serious testing on the weekend! I can easily get a Pink spring. Weights might be harder to get, but I'll do my best To get something to test with.

 

[Lasse]

I believe you have too light of weight..
The 10A polaris weights for the pipe setup shows that they weigh 58 grams..
I would put the 58 gram weights to er...

never said 10A polaris weighed 58 grams...
if you read my recommendations it is self explanitary,
it says with 3 grams added per PSI instructions especially when the 48 gram weights he had in there were not overcoming the secondary.

The Polaris 10A does not weigh 58 gram !
...That's the point!


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Polaris 10-series clutch weight chart....

Polaris Part # , Code , Weight

* 1321530 , 10-MR , 44.00 gram​

* 1321527 , 10-MW , 46.00 gram​

* 1321529 , 10-MB , 47,50 gram​

* 1321528 , 10-M , 49.50 gram​

* 1321526 , 10 , 51.50 gram​

* 1321531 , 10-AL , 53.00 gram​

* 1321685 , 10-54 , 54.00 gram​

* 1321589 , 10-A , 55.00 gram​

* 1321684 , 10-56 , 56.00 gram​

* 1321588 , 10-58 , 58.00 gram​

* 1321587 , 10-60 , 60.00 gram​

* 1321586 , 10-62 , 62.00 gram​

* 1321585 , 10-64 , 64.00 gram​

* 1321584 , 10-66 , 66.00 gram​