/

Enough "flesh" between the ports of this engine, so that wasn't the problem, like Corse-R suggested, it could be a bearing failure...... if not... then something did go through the engine......

Not nice, but could happen....

If it is a bearing failure, send back for warranty.....

0.071mm is 0.028" and 0.050" is 1.27mm??? :confused::confused:


M7H... you're basically a retard.... but I'll try to straighten you out.....

The head clearance means NOTHING without knowing many other things about your engine and head design. It is just a reference we use when determining compresion ratio. A NovaRossi engine (such as a 321P, say-because I know them like the back of my hand) has virtually zero head clearance without any shims. Add 0.7mm of shims and walla... you have 0.028" clearance.

I have not tried this with a Ninja, but lets see if we can work through it logically. With 0.55mm of shims you won't even touch 0.050" of solder rolling the engine over. This means a few things possibly:

1). It could mean the bottom of the button sits higher in the sleeve, thus requiring less shims for the same compression ration as a 321P.

2). It could mean that the combustion chamber in the button is larger for a different burn rate than the 321P.

3). It could mean that the sleeve sits higher or lower in the block.

My guess is that it is that the real reason for the shim stack on a Ninja is that the Ninja has a smaller combustion chamber AND raised the bottom of the botton- thus requiring less shims on the Ninja to achieve the proper static compression ratio.

Again.... I'm completely guessing logically here. Someone with a Ninja and Nova head could cc the combustion chambers and measure the button depth to find out for sure. I junked all my Ninja stuff when Mugen gave me headaches. I feel for all of you struggling with these engines..... not.....

M7H... I'l still think you'll be confused but good luck on your next shift at McDonalds... watch the coffee- it's hot :weird:

There is still resistance at TDC with no plug and it is not really easyto roll it over. Atleast it is harder to turn over than my VSpec:lol:. The top of the piston looks brown to me. No different than any other motor Ive seen with some wear on it. Which Ninja plug are you using?

found out the problem one of the ball's in the rear bearing has split and half of one side is missing these engines are the biggest pieces of shit if any one is thinking of buying one the need there head examined

lFrom what you showed, seemed a very possible cause. Better to do is call Mugen and tell them what happened, look if they allow it to send as RMA for inspection and repair... a bearing failure is very strange... how much fuel did it pass thru the piston?

If not, go ahead and put a TKO main bearing and re-sleeve it (sh*t happens everywhere... happened to me some years ago with only 1 litre of fuel), put one on one R01 from the past season (test mule) and is a cheap and great bearing (just be aware that ceramic bearings are quite different animals and need some tanks babying just to ensure that are properly seated... don't install it and go balls out to the track another time.. :sneaky: ).

In the next days I'll contact with Peter just to order more of their bearings to being TKO'ed all (and are a bunch the pending ones... :D).

is this the bearing you talking about
http://tkocompetitiondev.com/shop/pr...roducts_id=157

Yep...

And you are?.... :flaming:

If I say exactly the same, and then you don't understand?, who's a retard here then?
So you know a Novarossi engine like the back of your hand, but you didn't even looked inside a Ninja, otherwise you would know....
I know enough.....

now now guy's :D

hmmmm.... wonder what prompted you to look at those bearings :D

I took plenty of a look inside the Ninja..... that's why I dumped all four I had. The rods are garbage and one of the largest engine modifiers in the US says their bearings are the worst he's seen in the industry.

Look at the last 26 pages here.... where is the factory support? Mike S. did his job..... he won a few big races with the Ninja and got everyone to buy in. Now where is the support on these things?

So then you should understand what I meant....
But, never mind...

I agree, but if Mike says so, people here follow him.... (read his clutch set-up topic)
He also said some pages back, that he would never want to work for a company who asked +$500 for a stock engine... now Ninja askes +$600 for a factory modified one.... (which to me is still stock, because for sure it is machined, and not hand modified.....)

This is not very good new fella's, for people who have recently purchased and/or are currently running one !! :mad:

Wild Tiger:

Don't freak, $hit happens, last year put over 35 litres of fuel in one unit and 30 on other (the previous version). Now, on the 01a I go about 15 litres so, a bearing failure could happen to anyone on anyone engine is a matter of bad luck.

I don't share the comments of shitty bearings and faulty conrods, people swear and leave pi$$ trails for the Nova R7 conrod and the Ninja is exactly without a bronze bushing on the upper side.

Really don't know what happened to some people like CDelong, but for what says and how it says, I smell a catfight and some bashing to Mugen from it, you only need to go many pages before here and on the MRX-4 thread to see what was telling on a not so long past.