Hey man there are quite a few engines available right now. RB has engines that range from entry level performance with a low price tag, to more expensive powerful race engines.

C6USA - If you can find one of these they are the most powerful RB you will find right now, tons of bottom end power and just as much top if not more than the standard C6. It is basically a C6 with a modified/balanced/coated crank, and a modified head button. I only run this in truggy as I find it to be too much power for my buggy on most tracks.

B9 - The B9 is just the 2009 model of the C6. They have the low center of gravity cooling heads and turbo head buttons. This is a great truggy motor if you can't find a C6USA anywhere. It is also a good buggy engine if you have been driving for a while and can use the power it makes without causing yourself more wrecks.

WS9 - This is the new version of the original S7 which was very very popular for a long time. It has always been a square stroke 7 port engine, so it flies on the straight away. These engines are still 7 port but they now use the MES exhaust porting which basically looks like there is 3 exhaust ports. It was originally designed for European tracks with wide sweeping corners and long straights. A lot of people that run these on US style tracks don't like the bottom end in a truggy so it is probably best in buggy. This is what I run in a Losi buggy and I run with a 50 tooth spur rather than a 48, this gives me the bottom end I need for any tracks I have been to as well as plenty of top end for the straights.

Buggy10 - This is brand new and revealed at the toy fair this week, I have not seen the full specs on the engine but it appears to have a few changes from the B9. I can see the new strengthened and coated crankcase, and a new cooling head. It is still a 5 port engine with a 14mm bi turbo crank. There may be some other internal changes made that should be announced shortly.

Cross10 - This is also a new engine they released at the toy fair. From the specs I can see it should be very similar to the Shark9 that was a limited edition engine. This also comes with the new designed crankcase but does not have the coating. It has the new design L2G cooling head as well. It is a 3 port engine with the 3 port MES exhaust porting. It is also a long stroke 14mm bi turbo engine.


K9/K10 - This is RB's engine that provides pretty good power at a low cost. These engines are not Novarossi based engines so will not behave and tune like RB's you have used in the past. These engines are manufactured in Taiwan. Not being Nova based you will probably not be able to get 10+ gallons of fuel out of it like the more expensive RB's in the lineup.

S9 - This engine is the original S7 from back in the day. It is a square stoke 7 port engine with a turbo crankshaft.

Hobby9 - This engine is basically the old S5 that was in the lineup. It is a 5 port square stroke engine with a turbo cut in the crankshaft. It has a standard plug and a low center of gravity cooling head. This is the engine I ran in my buggy when I first started racing, was plenty of power when I was new and was very reliable.

Junior9 - This is the Old S3 engine. It's a 3 port square stroke engine and probably the least powerfull engine in the lineup, would be a great engine for a young kid getting into the hobby.