F2 Solos, (Read 853 times)

[bikeboy]

interesting theory coming out of England, using 450 MX motors,

www.dirtbikes.com/new-concept-f2-speedway-motorcycles/

the US has a 450 class in flat track, on everything up to miles I believe,

there was a bit of interest in getting a flat track class based on MX bikes going amoung the road racers over winter, anyone know why Rosebank stopped running the stock bike classes?

[tony27]

I can't see how they'll end up being cheaper, first you have to buy the MX bike just for the engine then build the frame to suit. There isn't really a market for the leftover parts as there are already a lot of rolling chassis from MX bikes around after their motors have hand-grenaded or the topend needs a very expensive rebuild that the owner cannot justify as the whole bike is not worth much more
Using a less highly strung larger motor may be a better idea, something out of a roadbike although then you're likely to be looking at a twin, AMA flat-track runs 1000cc twins mainly on the longer tracks & the 450s on the shorter tracks from what I can tell

[bikeboy]

Nov 25, 2015 18:29:18 GMT 12 tony27 said:

I can't see how they'll end up being cheaper, first you have to buy the MX bike just for the engine then build the frame to suit. There isn't really a market for the leftover parts as there are already a lot of rolling chassis from MX bikes around after their motors have hand-grenaded or the topend needs a very expensive rebuild that the owner cannot justify as the whole bike is not worth much more
Using a less highly strung larger motor may be a better idea, something out of a roadbike although then you're likely to be looking at a twin, AMA flat-track runs 1000cc twins mainly on the longer tracks & the 450s on the shorter tracks from what I can tell

AMA runs 650 twins and up, the Kawi's start at 650 but now sure if they are bored bigger, the harleys are 750's but run a restrictor, and there are a few Ducati, triumph and suzuki's twins that run up to 1000cc but have restrictors,

and on the short tracks (udner 1/2 mile) they mainly run the 450's, although next year they are going to run the big twins on short tracks and TT tracks as well apprantly,

get your point on the price, what is a competitive solo motor worth here? (or complete bike worth here) you can get 450 mx bikes for 3-4 K, and the parts to rebuild are available everywhere,

there was some talk last year mainly from road racers about running a flat track race on MX bikes, the motard class is one of the bigger classes on teh street races now, and those bikes should be able to run on dirt,