Jump to content

What does this piston say to you?

Recommended Posts

Piston: "There is quite a draught!"

Me: "Indeed Sir."

Edited by borgwarner

Share this post


Link to post
Share on other sites
Piston: "There is quite a draught!"
Me: "Indeed Sir."


Ok. Here's my take..But I'm new to 2T.
Bike was actually very soft down low with the electron. I just leaned it up 1/2 turn and now its very snappy again. But, by the look of the piston, I think the powerjet needs some more fuel. Carbon buildup is actually catchable with my nail where its at but looks like the piston is getting washed at wot.

What do you think?

Share this post


Link to post
Share on other sites
3 hours ago, mattwhidden said:

Ok. Here's my take..But I'm new to 2T.
Bike was actually very soft down low with the electron. I just leaned it up 1/2 turn and now its very snappy again. But, by the look of the piston, I think the powerjet needs some more fuel. Carbon buildup is actually catchable with my nail where its at but looks like the piston is getting washed at wot.

What do you think?

 

I think liquid fuel is washing the piston.  Guess would be that the powerjet is too rich.  

  • Like 1

Share this post


Link to post
Share on other sites

It's RICH somewhere, maybe not everywhere. Like Red said there is fuel washing the piston. The shape of the clean spots is showing the direction of the fuel flow both in and out of the cylinder in a very defined way. 

 

 

Share this post


Link to post
Share on other sites
It's RICH somewhere, maybe not everywhere. Like Red said there is fuel washing the piston. The shape of the clean spots is showing the direction of the fuel flow both in and out of the cylinder in a very defined way. 
 
 

It was DEFINITELY fat on the low end. Was actually softer down low afted the lectron was put on. Bogged if you snapped the throttle. After I leaned it up Half a turn it runs much stronger. No bog. But the topend with the lectron has been strong.

Share this post


Link to post
Share on other sites
3 hours ago, Mashy Man said:

Blendzenall.

Castro R

Are you out of your mind? Castrol R is great oil, and smells wonderful, but its a royal pain in the butt to deal with. It makes sense for that last tiny bit of protection in racing, but makes no sense at all for casual riding.

  • Like 1

Share this post


Link to post
Share on other sites

It's saying, "you dummy, shoulda bought a fi 450 4 stroke, wouldn't have to pull the head, or rejet, or mix gas, or put a lectron on, or rejet, or want more power, or rejet"

  • Like 1

Share this post


Link to post
Share on other sites
It's saying, "you dummy, shoulda bought a fi 450 4 stroke, wouldn't have to pull the head, or rejet, or mix gas, or put a lectron on, or rejet, or want more power, or rejet"

Already got one. Just collects dust after I bought the 300. 300 has just as much power. Far better suspension. Never flames out. And will never have to be rejetted after its dialed in.

 

What now? 0701170821a.jpg.5d58ff6b9eb94a494f669a06741b8ccf.jpg

 

 

 

  • Like 7

Share this post


Link to post
Share on other sites

Cool pic. The 300 is a case induction motor. Fuel travels to the cylinder by way of the transfer ports at the sides of the cylinder only. I'm not in the fuel washing camp unless the crankcase is flooded.

Share this post


Link to post
Share on other sites
Cool pic. The 300 is a case induction motor. Fuel travels to the cylinder by way of the transfer ports at the sides of the cylinder only. I'm not in the fuel washing camp unless the crankcase is flooded.

Bike runs EXTREMELY well with the exception of being a little soft on the bottom which was fixed by a half turn leaner on the rod.

Share this post


Link to post
Share on other sites

I got my eyes on an orange 300 XC myself. I wonder if I'd run into similar that you're having. I read in MXA that the stock jetting and the stock carb actually worked well with the 60:1. Did you give the stock carb a chance before going to the Lectron?

Share this post


Link to post
Share on other sites

it's rich some where like others have said, impossible to say where without testing and riding it.  

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:


×