ive already pre-ordered a b4.2 but only because for what it would cost to upgrade my car to 4.2 spec i will have spent more than the cost of the new kit. plus ill have all fresh plastics.

Hi there, just orderes a b4.2, been out of the hobby for a while, i also ordred a tekin 9.5, i know it will be a very large learning curve with that motor, my question is what gearing and what batteries do you guys recomend?
the track i will be racing on is a medium carpet track with jumps.
Thanks for any help.

I ran a 21T with a 8.5 motor of med/large dirst tracks, so for a 9.5T I would start with a 22T.

gearing is trial and error. Check for esc and/or motor heat after 5-6 minutes

24 / 81. Gear it that way everywhere unless there is something about the Tekin motors I don't know about.

Sounds good thanks for the input.

What bateries should I buy?

Thunderpower with bullets plugs They are the best in my opinion and have a two year warranty. Venom batteries have life time warranty reedy,smc,and fantom are all up in the premier battery class.

I would say Reedy batteries, they are the only batteries I use

But as mentioned by Chase, SMC are really good too

Guys my friend wants to know wether he should get the b4.2 or the rb5 sp2 wc? At his lhs they are having a major sale and the rb5 is $280. I have an rb5 and I think e should get one but he doesn't know.

I personally if I am racing woudl try and go with a current kit, or at least one that is close to the current kit if buying new but thats me. Especially as if you decide you want to sell, the price you will get will be better relative to an older kit. For some perspective, a buddy of mine if I recall correctly got a loaded RB5 with a whole ton of parts for like $150 shipped.

SpeedZone

www.SpeedZoneUSA.com

fond of promatch racing myself. the new IP lipos he is stocking are reasonably priced and have a 1 year warranty. I got some of the 7200mah 80Cs myself. Heard good things about SMCs as well with price to performance. I think there 6500s are pretty cheap right now, though dependent on what works for you of course.

I keep going back and forth between running a shorty and this big packs I have. Like the feel of the shorty but the big pack wasn't exactly off pace either.

Regarding 9.5 gearing, I much prefer the 75 tooth spurs over the 81. The 81 always feels undergeared, and the motor sits WAY back there.

Is it in? Today was the estimated date for AMain :P

Tell your friend to buy the B4.2 and let that old kit sit on the self. They are putting it on sale for a reason. Now if it was a RB6 for that price I would consider it.

I know it's probably been re-hashed many times, but in a nutshell, are any of the 'hop-up' alloy parts needed on a B4.1 other than the aluminum steering rack? I have the front brace and alloy rear hubs. Needing a quick consenus due to having parts re-anodized and don't want to leave anything out.