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Old 02-01-2009, 01:36 PM   #16
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Also keep in mind that engines with lower rpm's do not have the same material rods as the faster ones. Novarossi did number them in strength and currently I have seen R2 up to R7.

The R2 is placed in a Basic N21-3T and from own experience I can say it won't last long if you tune up the engine to the performance of the high priced competition models. I have seen R3 and R4 rods in offroads and the R5 and R7 are used in onroads, the R6 is a special model for JP.

Changing rods is cost effective on 600+ dollar priced engines, waiting until it breakes will cost more....
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Old 02-01-2009, 01:49 PM   #17
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Also keep in mind that engines with lower rpm's do not have the same material rods as the faster ones. Novarossi did number them in strength and currently I have seen R2 up to R7.

The R2 is placed in a Basic N21-3T and from own experience I can say it won't last long if you tune up the engine to the performance of the high priced competition models. I have seen R3 and R4 rods in offroads and the R5 and R7 are used in onroads, the R6 is a special model for JP.

Changing rods is cost effective on 600+ dollar priced engines, waiting until it breakes will cost more....
Point taken.
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Old 02-01-2009, 02:23 PM   #18
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My point goes back to my earlier comment (which I guess I didn't articulate correctly) that IMO changing a rod as preventive maintenance too often or too early in life will accelerate the wear on the crank & wrist pins.
I don't really disagree with that since the better Nova rods on short tracks last a LONG time. Changing them every gallon in those conditions is overkill. However, long tracks or non Nova rods need constant replacement or catastrophic failures will result.
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Old 02-03-2009, 08:38 AM   #19
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thanx to everybody that give a brilliant opininion and supportive comment...well i guess...im gonna stick with replacement of con-rod for every1-2 gallon...im an on-road racer...and i always run my engine a little rich...i dont like to tune my engine to the max limit...just nice to get the power then i will be concerntrating on other parts such as clutch system, pinion and spur gear to get race performance...

plus at my LHS i can get him to replace my con-rod and the pin at the sam time ...it's better isn't it?.......thanx guys...
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Old 04-14-2009, 12:03 AM   #20
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Can anyone point me toward a how-to on changing a rod? It's a novarossi if that makes any difference.
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