Big bike frames

[Scotty595]

How many people use big bike frames for there buckets (250s)? Was just having a look through the bucket racing website and saw a list of frames including RGV250, RS250, TZR, NSR, ZXR, CBR etc. Also what engine do you run in them?

Just wondering if anyone has any feedback about them as opposed to a standard FXR frame/engine combo (or other "common" bucket racer frames/engines)

[Henk]

There are a couple that I know of. An NSR frame with a DRZ125 motor in Hastings and Speedpros ZXR250 frame with a heavily modified MB100 engine, they both seem to go alright. Shelracing had a Yamaha Delta frame with a lonchin motor for a while but I think the bike has evolved a bit since then. Still unning that frame as far as I'm aware.

[jasonu]

Don't do it unless you are a bigger size (like MGreen aka speedpro who is tall) as you will wind up with a 100+kg machine that has to compete with bikes with similar power that are 20+kg lighter.

[Scotty595]

Don't do it unless you are a bigger size (like MGreen aka speedpro who is tall) as you will wind up with a 100+kg machine that has to compete with bikes with similar power that are 20+kg lighter.

Im not too tall. Average. Little bit heavy though so i'm assuming it will just make me on a very heavy bike and not much power

[Kickaha]

I was a bit sceptical until this last season when I rode bren_chch TZR framed FXR150 for the MotoFXR season, handling was considerably better than a stock FXR, good brakes and good rim sizes for the slicks, I weighed in at the time at 90kg+ as well, there were quite a few lighter rider/bikes finishing behind me

The stock FXR is a good package but it can be improved on

[Yow Ling]

I have a TZR framed FXR, i think its about 92kg which is a good 10 kg less than a FXR, its a long way off a RS frame but i could get the weight down a bit with different wheels etc. My problems are rider related, not bike related at the moment

I have been building a RG250 framed bucket with a TF100 , it has plenty of promise weighs in around 85kg, the promises are still to be realised.

ive got a few other frames RGV250 VJ21, and TZR250 3MA but I cant see me using them as buckets they seem to be pretty bulked up and would look a bit silly with skinny wheels.

One of my first buckets was a RZ250 frame with a fxr motor, Gavimoto has it now I think he stole the front end for his fxr

[Scotty595]

I have a TZR framed FXR, i think its about 92kg which is a good 10 kg less than a FXR, its a long way off a RS frame but i could get the weight down a bit with different wheels etc. My problems are rider related, not bike related at the moment

I have been building a RG250 framed bucket with a TF100 , it has plenty of promise weighs in around 85kg, the promises are still to be realised.

ive got a few other frames RGV250 VJ21, and TZR250 3MA but I cant see me using them as buckets they seem to be pretty bulked up and would look a bit silly with skinny wheels.

One of my first buckets was a RZ250 frame with a fxr motor, Gavimoto has it now I think he stole the front end for his fxr

Have been thinking of something like an rs250 frame with loncin/fxr motor inside.

[Skunk]

I have a TZR framed TF125. Sketchy has a RGV framed MB100 and Speedpro's is a FZR frame I'm sure. Fishy's is a ZXR framed Loncin.

[bucketracer]

I have been building a RG250 framed bucket with a TF100 , it has plenty of promise weighs in around 85kg, the promises are still to be realised.

Is an RG frame a good bet for a bucket with a 2-stroke motor? they seem to come up on Trademe once in a while.

.

[Yow Ling]

All the problems ive had are nothing t to do with the frame, handles good still got a wee way to go

[speedpro]

Mine is an FZR250 3LN(later model) chassis. Most of the 250 chassis are sport oriented, though they are about 20years old now they are still better than the cheap commuter models such as the FXR. Standard they generally have good rim sizes, outstanding brakes, in fact you can lose a disc and still be plenty good, and the suspension can be tweaked to perfection. Being a bit bigger they are more comfortable but could be slower on the big tracks due to drag. Weight wise I think you can expect around 90Kg with a 2-stroke engine and a bit more with a diesel. Being physically bigger you can fit any legal bucket motor in without any problems.

I reckon they are the go unless you really want the serious lightweight performance of an RS.

[saxet]

I run a RGV250 rolling chassis, GSX250r rear rim with GP125 engine at present. I prefer the RGV ,which has been jacked up at the rear, to the FXR as it feels more rigid and can absorb rougher treatment....tho that could be all in my head.

[koba]

Don't do it unless you are a bigger size (like MGreen aka speedpro who is tall) as you will wind up with a 100+kg machine that has to compete with bikes with similar power that are 20+kg lighter.

I think the rigidity of a such a frame helps alot on a kart track, it may be a different story at Taupo or Ruapuna but were we race it has less to do with power to weight ratio.

Plus being easyt to ride it worth alot as one learns.

[koba]

Is an RG frame a good bet for a bucket with a 2-stroke motor? they seem to come up on Trademe once in a while.

.

Standard front rim is 16 inch so that deserves the bin due to lack of tyre choice.
I think they are probably OK but I wouldn't pay too much for one.

[Geriatric]

Hi, Ive got an old GSXR250 (87/88) steel frame with 70's Yamaha DT125. Put 20mm spacers in the forks and a 5mm spacer to stiffen the rear spring and it handles really well. Good thing about steel frames is they are easy to chop and weld. Weight is 97kg.
Took one of the discs off the front to reduce weight and changed the brake reservoir and lines for the required hydraulics and haven't noticed any difference in stopping ability.
made up some rear sets to lift the pegs up 25mm and back 25mm
I'm over 6ft and a bit long in the tooth so find the extra height of the 250 frame much easier. Rode a couple of smaller RGV types and felt too cramped (15 laps of Kaitoke and the old joints complain somewhat)
Now if I can get the engine sorted and tuck the chamber in bit for better ground clearance, I'll be happy