Look what I found in the shed

[Duck-Stew]

With a pair of their jamb nuts. 

[Pinion]

With a pair of their jamb nuts. 

Yeah baby 

[koko64]

 Should spin up. Flywheel might be 500gms.

[Pinion]

No bike should be seen in this state, the mess before the beauty

763BF0C6-1564-4146-91A4-AA11294248EF by D charles, on Flickr

[Pinion]

Any opinions on JE pistons,high compression, can of worms is open, do I need to do anything on a 900ssie motor on timing adjust, etc
Found a set really cheap. Please share your horro story, and save me from myself

[koko64]

Great bang for buck hi comp forged piston and are an excellent performance mod in my limited experience.
Have only dealt with four sets of the J&E brand (3 × 904, 1 × 944), but no issues except with the carbed motors.

The valve pockets appear deep for clearance when you check them. Interesting what your squish clearance will be with the older heads on the newer motor.
You get another, faster bike by waking up the compression with these motors.

J&E give around 11:1 claimed compression requiring premium fuel.

The extra comp broke engine studs in the older 900 motors, but the 900ie has the revised, stronger studs. (Black studs good, shiny studs bad).

Older carbed 900's needed ignition tuning, but the 900ie has a nicer curve (or should I say it has a curve and not a cheap step).

I read somewhere once that the off the shelf J&E was a smidge looser or tighter in some years barrels due to very slight variations from the factory, but have only heard/read it once.

Have not heard piston slap yet with the J&E brand.

We put them in my brother's M900Sie and it really works well with the capacity and cams. With stock compression I found his bike underwhelming. It seemed there was too much cam for the stock comp or not enough comp for the big cam. With higher comp the 900ie is now my favorite 900.

[Pinion]

Thanks, squish on heads is identical
Figured why not, full set for 260 us
Bikes apart, and with about 6lbs of rotating mass gone, could be fun, lol

[pepeducat]

The pistons JE are of good quality, I have mounted on several engines and nothing to say to date.

By cons for mounting control that the squish is at least 1.1mm because they compress very strong (between 11.5 / 1 and 11.9 / 1 for those I have mounted).

For the squish valves / piston this goes without problem.

Then you will have to inject a new map into your calculator (I can provide it to you if you need it).

And after enjoy 

[Pinion]

The pistons JE are of good quality, I have mounted on several engines and nothing to say to date.

By cons for mounting control that the squish is at least 1.1mm because they compress very strong (between 11.5 / 1 and 11.9 / 1 for those I have mounted).

For the squish valves / piston this goes without problem.

Then you will have to inject a new map into your calculator (I can provide it to you if you need it).

And after enjoy 

I like maps, been running without air box as well

[Pinion]

Ok, now for the rear calipers, is there anything available other then the blob of aluminum Brembo rear caliper, any CNC options, bla bla bla.
Below are what’s going on the front, they don’t make an 80mm bolt set up, just a 84mm bolt set up


E6342877-31F4-4D68-9664-09769DE66E98 by D charles, on Flickr

[Speeddog]

Billet Brembo here:

https://www.oppracing.com/category/1091-rear-hp-calipers/

[Pinion]

Billet Brembo here:

https://www.oppracing.com/category/1091-rear-hp-calipers/

They are all 84mm too, thanks though

[Pinion]

New fun

So i sent my motor out to be “chemically cleaned and prepped for paint
Got it back and it had this funny hue, like it had been media blasted, ( can ya see where this is going yet)
Low and behold silicate all inside everything, M. F. Ker.
Anywho, separating cases, tools etc, gotta clean that sh#t out 

I need tools, crank pulls tool, etc
Also stay tuned to see if I can make up a new curse word

[Pinion]

Mmmm tasty fun today. Complete motor tear down.
Clean and re assemble.
Yay

D49C0861-EC52-4C30-BBCB-8646C92FF349 by D charles, on Flickr

[Pinion]

I’ve gotten so intimate with this thing, we would have to get married in some southern states. My fingers have been everywhere 

9963A8D7-047B-462A-8180-EDD0EE4410FE by D charles, on Flickr

37FA86E4-0284-48D0-8865-0E560DC4F839 by D charles, on Flickr

44DC22A6-C42A-49A8-9055-0683B571AE17 by D charles, on Flickr