what are you looking for?

You can send Savagesam a PM (post #6471) he has run the motor.

I am just looking on feedback of this engine i heard the fuel consumption is high

So I Love the Plus 21-4 BTTWC/A engine. Break it in, swap the rear bearing for ceramic and run the piss out of it. I've got one with almost 70 liters on it now and it still has decent compression. With a werks 2058 pipe on it the power is so buttery smooth it's straight crazy. I've been looking at the 2018 Plus 21-4 BTT Limited Edition engines that are popping up on websites that are priced cheaper than the BTTWC/A. Has anybody seen/held/ran one of these yet? The specs read exactly the same as the BTTWC/A, but from the pictures I've seen it has the new carb on it. Just checking to see if anybody has any feedback on it before I drop the coin on a replacement for my current BTT.

could just be a btt, could be lacking the "tuned" crank but you would need to see an exploded diagram to cross reference part numbers

Since mantra is not offset carb ,the opening "window" on the crank is on different area than tye mephisto crank has it.

The Mephisto doesn't have an offset carb either. Carb and crankshaft is the only difference.
http://www.novarossi.it/2012/images/...ova/MANTRA.pdf
http://www.novarossi.it/2012/images/...FF_general.pdf

Ups..
My bad..
​​​​​​i tthough that it is offset like the other engines in Mephisto series.

Beside the offset carb Novarossi also ditched the weird expensive main bearing with the onroad Mesphito

Who has feedback in regards to a Rolling in buggy? I am considering getting one for when I just want more power. A friend of mine is running one in his tekno buggy paired with the novarossi 2135 pipe and he really likes the combination .

I'm replacing my clutch bell but when I go to tighten the retaining screw and washer, the clutch bell binds. I have 4 washers behind the rear clutch be bearing.

https://cimg8.ibsrv.net/gimg/www.rct...5ef2438b94.jpg

You can use small 3x5mm shims to "extend" the crankshaft or you couod get one of theese:

https://www.google.no/search?q=ofna+...71O0yfM:&vet=1

Or, you could try and rempve a coupple of shims. As long as the clutchbell do not touch the flywheel you should be ok.

I always start without any shims between front bearing and flywheel. Ive never needed to shim the flywheel. Now between flywheel and clutchbell - different story. This almost always needs shimming to have the proper backlash needed.

Each collet might be different from manufacturer to manufacturer, weather it be the cone pitch or length. Pick the one or shim it to where the flywheel is as close as possible to the case without rubbing. Then add the bell with bearing and add one shim at a time till you can spin the bell with out it rubbing on the flywheel. Then finally shim the play with shims on the front of the bell. .94mm of play is what Monty recommends .

.94mm is equal to .0037”. That seems like a lot. I usually shoot for .001-.002”. You need a little endplay, but as minimal as possible.

Sorry meant .04

I misspoke. 0.04mm is perfect.

need shaft extender washer .....

Yep. I was using one but I figured out the problem. I was thinking that I had put 2.4mm worth of washers on the extension. Everything is good now.

Initially they said .94, but corrected it in a subsequent post... I don’t study the metric system, so I use those stupid and rarely accurate internet converters. Oddly enough, I suspected another conversion I did didn’t make much sense... So only after using a different formula did I find the mistake and the correct conversion result. I’ll edit my post to read correctly.

Yup. Comes in a clutch shim kit usually.

anyone ever measure up the bore and stroke on the mantra? not just what nova states but the actual numbers. Unless he was getting some weird numbers its not a square stroke motor or a .21, its 16.46 bore with a 16.8 stroke closer to a .23 than a .21.

[QUOTE = HaulinBass; 15420134] alguém já mediu o furo e o derrame no mantra? não apenas o que a nova diz, mas os números reais. A menos que ele estava recebendo alguns números estranhos não é um motor de acidente vascular cerebral quadrado ou um 0,21, sua 16,46 furo com um golpe 16.8 mais perto de uma .23 que um .21. [/ QUOTE]

Its 16.42mm not 16.46mm

is that measured or what novarossi states? because the guy that measured mine gave me those numbers and its a guy whos opinion is fairly well trusted

A 16.46mm bore and 16.8mm stroke gives a swept displacement of .218 cubic inches.

According to Nova, it’s a square stroke engine with a 16.42mm bore and stroke giving a swept volume of .212 cubic inches.

What .21 engine are people recommending for truggy nowadays that the rex paloma limited isn't being sold?

A Roma .25 is what I have seen many people run here.

I have also see some run regular .21, Elite 5 and Rolling.

hello.

Any one tried the new P5XLT 2019? How is it?

Thanks

Honestly most nova 21s are more then capable of moving a truggy very well... my favorite for truggy is any of the P5 variants, like the Elite 5 or P5XLT.... I'm currently using a blue top nova paloma.

or too many washers to start with

i have personally installed many buku clutch assemblies and novarossi made engines into losi , tekno and serpent cars ...... it was necessary to install clutch so it needed shaft extender washer .....

Yep, my serpent stuff definitely needs the losi extension washer. Kind of annoying.

Another route of finding the model would be going to Novarossi website and looking at all of the engines and see which best looks like yours. They have all of the discontinued engines also. Good luck .

What Soyer said.

PLUS 21-4 BUGGY - NOVAROSSI WORLD

http://www.novarossi.it/2012/images/...plus4buggy.jpg

Did it come with the hair wrapped around the carb? lol