Have the 212 cc predator with a 6x4 prop now. Get about 7-8 mph two guys no gear 1436 riveted. Going to get the nr racing stage 2 hop up kit which says it will then be a solid 10 Hp. Will an 8x4 or 8x5 be big enough. And on the pitch does bigger give your more low end or speed.? Thanks in advanced.

You need to look a the tach and play with the prop. Every inch of pitch can increase/decrease speed. The rpm’s will also increase/decrease 200-400 rpm’s per inch

You may not have the power to go up in pitch. Also the gear ratio is important.

I would change out the top pulley and play with that first.

good luck.

It's a long tail motor. My first m m just built it this year. And when I built it I heard so many different prop sizes to use I didn't know where to start. That's y I was wondering which one to get when I jump up the Hp.

Also I don't have my tach on yet. Does anybody know what the stock 212cc rpm run at? I'm gonna try and get it on this week sometime.

I m

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