January 29, 2013
Tim on a borrowed RS125 frame with GP125 engine
I spent my Saturday and Sunday at Mt Wellington for a practice round and a non points race day. Having not raced since November, I was eager to get as much track time as I could handle which consequently ended in my body now being wrecked!
It was a really good weekend of bikes with clear skies and a breeze to keep us slightly cooled. I let a few of my mates have a go on my FXR which should hopefully kick them into gear and mean they’ll soon be out there. During the Saturday practice I made the most of my opportunities to follow Brian and others where I could in the hopes their riding ability may rub off on myself. Brian gave me a few pointers on braking which helped hugely and lead to setting a new PB of 32.61s anticlockwise. On Sunday I improved on this with a 32.20s anticlockwise and I’m eager to keep the ball rolling into the 31s bracket! Thanks guys, I appreciate the hell out of any guidance I can get.
5 lap sprint anticlockwise with no grid order (first on the grid gets pole) then straight after returning to the pits, back out for a 5 lap clockwise sprint
10 lap race around ‘the ring’ (midfield coned off) anticlockwise then straight after, clockwise 10 laps. Again no grid placing.
Borrowed bike race – anyone can enter as long as it’s not your bike – 10 laps clockwise then 10 laps anticlockwise around the ring.
I swapped bikes with Rick’s son Will who rides a CBR150 with cams, exhaust, carb, which was really fun! It had much better throttle response and seemed as fast as my FXR (which has more work done to it) although I need to work on the jetting of my bike still. The CBR150 hasn’t been on the dyno before but I’d love to over lap the curves between bikes for a comparison.
Thanks to all that helped out and organised the day, great fun!
Tim on his own Aprilia RS50
Cully’s FZR250 frame with GP125 engine
Will on the CBR150
and again hustling with John in the midfield
Andrew slipping out of first position during an anticlockwise ring race
More to come
January 25, 2013
I made some clip on bars this week after work for the GP125. I’ve very stoked to have them at a more suitable height! Now I just have to cut off the front and rear foot pegs and make some new ones to correct the seating position.
The bars are currently at quite a shallow angle due to the bulk of the factory tank. I’m not about to chop and weld it but man I wish I could! I’m toying with the idea of making one from scratch in the search for less mass and better fit. I suppose I’ll see how I get on.
The above are two reference images including the bars. Note the frame shape, I’m hoping to change that…
January 21, 2013
So here it goes… the GP125 is in pieces, the engine is out, the unnecessary road gear is in the bin, clip ons are 3/4 done and I’m studying 2 stroke tuning like a fat kid on a sugar high.
Some reference photos of the engine because I’m yet to see any decent quality ones online:
December 11, 2012
So I bought another bike… that’s two bikes and soon to be 3 cars… sigh.
We drove 8 hours in the day round trip to pick up this (what I’d call a) bargain and I’m stoked! Pictured above it my old man Simon who turned 61 on Monday, (happy birthday dad!) having a hoon up the driveway and in general causing a ruckus. I did this for quite some time by the way, all the while with a dumb grin on my face, two strokes are better than four!
It’s a Suzuki GP125: a single cylinder rotary valve air cooled 125cc 2 stroke motorcycle. It’s a bit rough but runs really nice and absolutely craps on my old Honda CG125 when it gets up into the power band. I have lots of plans for next year and I hope to include this within it. Just for reference, there is an awesome guy by the name of Rob who owns a motorcycle dyno, does a lot! of home tuning and makes 30hp out of his own GP125 engine in a FZR frame… that’s 240hp per litre and it’s air cooled! I’ve been on the track at Mt Wellington with it and man is it quick. It just needs a track with a bit of leg room and it’d wipe the floor with us. Well Rob and his team of mates who all race buckets (F4 class) have put the specs and a how to on building a 30hp GP125 up on the internet to follow and build your own. It’s tempting and I would be lying if I wasn’t going to tweak this thing up at least a bit but we’ll see what happens first.
I’m also buying a van tomorrow for the North Island Series and for summer surf missions so everything is fitting into plan nicely. Bring on the holiday!!!