So I'm still trying to hunt down a couple C5TGC plugs locally(i.e. in Germany..) for my Fire 11.. Is it worth ordering a C6TGC too? See them around here and there as well.. Amain too...

I would say it would be worth getting the 6 as well. I like to have both 5's and 6's with me.

Hey iam thinkin bout buyin a rb engine would the killer 9/10 be a good choice for truggy any imput is appreiciated thx

I personally prefer something Nova Rossi based made for RB. Maybe the F11 or something

Killer's have a pretty soft/smooth bottom that's not really appropriate for truggy.

I have heard some people really like the K10 engines, but like stated above they are not Nova produced engines so the quality will not be there. If your looking for a low priced engine for a truggy I would do like Chris Reilly said and get the F11. The B11 will work good in truck, but is not a cheap engine.

The killer engines are really quite nice to drive--in buggy. I've got one that I put about 3.5-4 gallons on and it's still got plenty of compression with zero rod slop, still runs excellent and gets 9+ minutes a tank @ 230ºF... I just decided to switch it up for the new year and the Killer will get put into a GT8 onroad.

Agree on the F11 for truggy, especially if you have another carb that you can put on. The old style is what made me decide against an F11 for the new year.

Honestly there is nothing wrong with that older style carb. It's still a Nova carb and is still much better than a carb you will find on most other engines out there IMO. Yes the idle screw is on the other side of the carb but in all honesty you should not be adjusting that needle very often if ever once you have a good tune on the engine. I race on tracks that range from 3,500 feet elevation to 6,500 feet and even from one extreme to the other I don't ever have to mess with my idle. The fuel mixture will need adjusted to compensate for the altitude changes but not the idle.

I ran the Killer 910 in truggy, it ran real well in the truggy, didnt see many other with the same speed, its best to pick up and extra set of o-rings for the carb, they seem a little cheezy.

I have decided to bring my WS7 III out of retirement. I replaced seals and bearings. I have added a turbo head button. Compression is good. I am using a 2045 pipe and a 198 header pipe. I was doing some baseline tuning the other day and noticed at max RPM there is a cracking noise that almost resembles a 4 stroke valve float. HSN did not have any effect. Any thoughts? The motor make good power up until it revs out.
What is "normal" fuel leakage for the front bearing? Should the amount of leakage be used to determine the condition of the bearing?

Local guy here runs the K10 in his MBX6T, and it goes very, very well.. His pal is always buying the really expensive stuff - Toro Nero, Capricorn whatever, and the K10 just keeps going whereas his buddy's expensive stuff causes lots of problems. Not newbs.

Also, if the K10 is really identical to the Go GX-5R as I have heard, then it's plenty grunty for truggy... The Go's are underrated, just because they're from Taiwan.

Like other said, K10 haven't got the power in a truggy for US style tracks. Normal European tracks doesn't need much power - only a reliable engine like the K10. Don't expect to run more than 5 gallons with a K engine. The weak spot are the crank pin.
I would vote for a F11.

Don't buy that completely.. There have been plenty of videos over the years from the States with Go 5-ports and even 3-ports with truggies tearing it up pretty well on US tracks.. Also, the Go thread is long and full of happy US truggy drivers, so maybe not for some tracks, but for most the Go 5-port is a good engine.. It was also a tremendous value in kit form with the spare conrod, two plugs, pipe, venturis, head shims, etc.. People even say the 5-port is too much for buggy - which is what most people say about engines more optimal for truggy. I also ran a Caster Grenade (Go 5-port clone) in an RC8 buggy, and it was probably over-powered for most serious buggy racers... It was also easily the best idling engine I've had... My other Italians so far have been a Nova 528XR, an Orion 24, and a Picco P7 Evo 2.. The Picco was good, but the first two absolutely SUCKED. Oh yeah, also have a Nova 5-port now, and it's good, but not outstounding or anything. I'd take the Go over it..

Yes but you did not buy your Nova 28 new did you ?.... ended up you were running bad fuel or something no ? regardless it doesn't matter anyways....but to clarify the RB K10 is the same engine as a OFNA JL .21...it is made by Force not Go...........

With weaker engines you MUST have a perfect approach for the big jumps, washboards (??) etc.. Its much easier to clear jumps etc with a powerfull engine, where you only needs a few meters to get enough speed to clear the jumps.

You can save many small driving mistake with a powerful engine!