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21st March 2010, 22:10
Six months ago I purchased this genuine Rothmans Honda MC21 NSR250R SP from Cyclespot in Auckland for $7,995. Pretty reasonably price for this limited edition bike in dam good nick.
The front fairing is fiberglass but the rest of the bike is pretty much stock.
This is the SP model, 1 of 1500 out of the factory in Rothmans colors with the fully adjustable suspension, dry clutch and light weight Magtek wheels.
Gorgeous bike, I use to drool over the brand new Rothmans MC28 in Casbolts years ago.
Three weeks before I got the bike I broke my collar bone and when it arrived I was in no shape at all to ride.
So I sent my trusted mate who has been riding two strokes for years out for a test ride.
We did all the normal things before riding a new (second hand) bike.
Brakes work? Check.
Coolant level ok? Check.
Gearbox oil? Check.
Two stroke oil? Check
Start her up. She's blowing healthy blue smoke.
Warm her up.
Mal takes off down the road.
10 minutes or so pass and Mal comes down the road very sedately, pulls up the drive and shuts her down.
Mal was pretty gutted to report she seized up no more than 3kms down the road. After 20 kicks or so he managed to get it started again, and babied it home.
The bike got picked up by Hampton Honda and was on it's merry way to be diagnosed.
Bad news.
Crank bearing is lunch and it spat bearing bits up into 1 cylinder.
Grant (the big cheese) at Cyclespot was also pretty gutted to hear the motor was toast, but he has been totally awesome about the whole thing. After searching for parts and not being happy replacing them with 2nd hand parts, he ordered 1 new barrel,piston etc and a new crank from Honda Japan.
I asked him "How about I pay for the other barrel, piston etc and I end up with pretty much a brand new motor?"
"And how about this Tyga performance 300cc big bore kit?"
He was cool with that. Worked out cheaper than getting new Honda parts anyway.
As a customer of Cyclespot Honda Auckland who has had to endure an unfortunate event with my purchase, I recommend them to everybody. They have been very helpful and supportive in the repair of my precious motorbike.
So then I realized, you cant big bore a two stroke without letting her breath more.
So the order from Tyga consisted of:
300cc big bore kit
New crank
GP style Stainless steel expansion chambers
Carbon blue mufflers
High flow reed cage and carbon reeds
Other mods are:
Kiss de-restriction loom
Airbox modification
Of course I paid for everything except half the big bore kit and the crank. Which includes a bill at Hamptons for time taken fitting the big bore kit. (It's not a straight bolt on job)
The mechanic drilled an old set of jets out to 170, she is still a little on the slightly too rich side. But it hasn't fouled any plugs yet, and very soon I am going to organize it to be tuned on the dyno.
The average power output of a MC21 with these mods is bordering around the 70bhp mark.
I weighed her today, stock dry weight is 133kgs. Today I forgot to fill the tanks right up before hand so I'll do it again one day, but with about a liter over reserve and the two stroke bottle under half she weighed in at 130kgs wet.
The front fairing is fiberglass but the rest of the bike is pretty much stock.
This is the SP model, 1 of 1500 out of the factory in Rothmans colors with the fully adjustable suspension, dry clutch and light weight Magtek wheels.
Gorgeous bike, I use to drool over the brand new Rothmans MC28 in Casbolts years ago.
Three weeks before I got the bike I broke my collar bone and when it arrived I was in no shape at all to ride.
So I sent my trusted mate who has been riding two strokes for years out for a test ride.
We did all the normal things before riding a new (second hand) bike.
Brakes work? Check.
Coolant level ok? Check.
Gearbox oil? Check.
Two stroke oil? Check
Start her up. She's blowing healthy blue smoke.
Warm her up.
Mal takes off down the road.
10 minutes or so pass and Mal comes down the road very sedately, pulls up the drive and shuts her down.
Mal was pretty gutted to report she seized up no more than 3kms down the road. After 20 kicks or so he managed to get it started again, and babied it home.
The bike got picked up by Hampton Honda and was on it's merry way to be diagnosed.
Bad news.
Crank bearing is lunch and it spat bearing bits up into 1 cylinder.
Grant (the big cheese) at Cyclespot was also pretty gutted to hear the motor was toast, but he has been totally awesome about the whole thing. After searching for parts and not being happy replacing them with 2nd hand parts, he ordered 1 new barrel,piston etc and a new crank from Honda Japan.
I asked him "How about I pay for the other barrel, piston etc and I end up with pretty much a brand new motor?"
"And how about this Tyga performance 300cc big bore kit?"
He was cool with that. Worked out cheaper than getting new Honda parts anyway.
As a customer of Cyclespot Honda Auckland who has had to endure an unfortunate event with my purchase, I recommend them to everybody. They have been very helpful and supportive in the repair of my precious motorbike.
So then I realized, you cant big bore a two stroke without letting her breath more.
So the order from Tyga consisted of:
300cc big bore kit
New crank
GP style Stainless steel expansion chambers
Carbon blue mufflers
High flow reed cage and carbon reeds
Other mods are:
Kiss de-restriction loom
Airbox modification
Of course I paid for everything except half the big bore kit and the crank. Which includes a bill at Hamptons for time taken fitting the big bore kit. (It's not a straight bolt on job)
The mechanic drilled an old set of jets out to 170, she is still a little on the slightly too rich side. But it hasn't fouled any plugs yet, and very soon I am going to organize it to be tuned on the dyno.
The average power output of a MC21 with these mods is bordering around the 70bhp mark.
I weighed her today, stock dry weight is 133kgs. Today I forgot to fill the tanks right up before hand so I'll do it again one day, but with about a liter over reserve and the two stroke bottle under half she weighed in at 130kgs wet.