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Unread 09-14-2020, 02:03 PM
Navin Navin is offline
Junior BAT
Join Date: Feb 2020
Location: Weeki Wachee, Fla
Posts: 11
Default AM6 BB top end recommendations

Trying to set up a new AM6 50cc engine and Im going to want a +65cc top end on it ASAP for mini enduro off roading. Im not interested in the highest HP/top speed, just looking for a boost across the board and still with some durability on the stock crank. It will get a set of HD clutch springs and nice low gearing but Im not planning on beating it to death.

My current street use Derbi EBE075 engine is stock with a 21mm carb, jetting and an open MX silencer. That's honestly all Id need from the new engine. It will prob get a pipe and intake/carb too but use a near stock air box.

So what brand/size big cylinder kit is safe and effective? Ive no experience with these brands and so many to choose from. Thanks!
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Unread 09-17-2020, 11:41 AM
twinturba's Avatar
twinturba twinturba is offline
Moderator - $ Donating Member
Join Date: Oct 2005
Location: San Francisco
Posts: 1,026

We have been using top performance for 20 years. They make great stuff.

Check out the Top Performance 85 Maxi kit
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Current FTR, Metro, RS250³, V7, RC39, TT, Max, Nastro, Bangkok, 85 ADV

Past: Newd, Zuma, Diavel, Zero, Grom, M696, GTS300, KLR650,SC1000s, CeRbi, SPR, 959 Corse, CB300R, SRMotard, Versys, Typhoon, NCXD, RC390², Madass, PW50, KTM BR 65, Aprilia BR50, Aprilia RS125², DRD, WR250X, Derbi SM⁷, Aprilia RS50¹⁰, Derbi GPR³, Aprilia RS250², Mito², NSR50², NS50, HRC RS125, HRC RS80, YSR63 (1st 2stroke!), FZ600, KLR250(1st Bike!)
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Unread 09-17-2020, 04:44 PM
Navin Navin is offline
Junior BAT
Join Date: Feb 2020
Location: Weeki Wachee, Fla
Posts: 11

Thank you!
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