Winter tart-up: Pitbike Supermoto

[garth]

This past year I've been participating in the matchams pit bike series, I managed to do five of the nine rounds, although one of those I had a big crash in the first race and didn't do the rest of the day. Race day is 2x15m warm ups, 3x10 lap heats and 1x12 lap final (the final is what counts for podium credits and trophies)

Out of those five rounds I picked up two third place trophies and won the class B championship (fastest fatty...!)

I'm 6'2" so probably not built for pit bikes but it's very enjoyable, and I'll be back next year. The bike needs a touch of work though.

Here's how it started the last round:

https://i1275.photobucket.com/albums/y459/nark_square/84C8A9C7-55F9-4E72-AB3A-0B8447A5664A_zpsowmdu8ts.jpg

https://i1275.photobucket.com/albums/y459/nark_square/82779E77-0783-43D6-B72E-33B798FF4F6D_zpssacsdd6y.jpg

And here's how it stands in the shed. I sort of abandoned it when I went to Africa. The handguards and front mudguard have been removed in this one.

https://i1275.photobucket.com/albums/y459/nark_square/8A28B477-FEC3-4516-B5C1-1B4F65C00984_zpsc0fhufpf.jpg

The thing that's been bugging me all year has been my straight line speed, I'm good enough on the brakes and corner entry, but others seem to pull a bike length on me down the straights, even if I'm on the throttle before them. I noticed the baffles in my C90 exhaust were rattling all over the place, and on closer inspection, the outlet pipe smaller than others. Turns out when I put this pipe on it was off my C50LAC and appears to be different.

https://i1275.photobucket.com/albums/y459/nark_square/770B1DFD-F4E1-45AE-8840-FD9DA3982BCC_zpsc5u6gwck.jpg

You can also see the rear tyre has had it, this was a supersoft MC31, in future I'll use a soft (as this was supposed to be - I got sent the wrong one and didn't check, I've a soft on the front)

I've also picked up a different header pipe, if you compare the two you can see the replacement is both a larger bore and free from welds which should help the gasflow.

https://i1275.photobucket.com/albums/y459/nark_square/IMG_14381_zpsd25fdf00.jpg

https://i1275.photobucket.com/albums/y459/nark_square/8371956B-BE25-4B79-ACF1-1EB204F886A3_zpsrmru4srk.jpg

https://i1275.photobucket.com/albums/y459/nark_square/IMG_14501_zpse3502edf.jpg

After a quick clean up and chopping both the silencer and the header to the correct length, I got my old man to weld them together.

https://i1275.photobucket.com/albums/y459/nark_square/IMG_14551_zps6f6a5615.jpg

https://i1275.photobucket.com/albums/y459/nark_square/C2C70F4E-CCE0-4BF4-9F69-1EC8351FB86F_zpsvjw2uq5y.jpg

I'm hoping this will help me down the straights!

Next job is fitting my replacement kickstart.

Old:

https://i1275.photobucket.com/albums/y459/nark_square/IMG_14401_zpsbfd18958.jpg

New:

https://i1275.photobucket.com/albums/y459/nark_square/IMG_14411_zps9d460441.jpg

You can probably also see how fucked my footpegs are. I'm going to try and figure out how to raise them to give me more ground clearance.

Bodywork off, new exhaust not yet on:

https://i1275.photobucket.com/albums/y459/nark_square/4EA5B59D-9404-44E8-8025-118BFE062942_zpsk3tionm2.jpg


More to come...
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You ain't a has been if you never was

[ride_to_die]

Looks fun, how much does it cost to take part?
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I'm not here for a long time, I'm here for a good time.

[garth]

£40 per race day, £25 1/2 day practice or £40 for a whole day.

This is what it does to your boots!

https://i1275.photobucket.com/albums/y459/nark_square/IMG_14751_zps04934542.jpg

Oil line weeping, again. Will replace and get spares.

https://i1275.photobucket.com/albums/y459/nark_square/IMG_14821_zpsf01cd187.jpg

Stud snapped off in rear spindle, both sides.

https://i1275.photobucket.com/albums/y459/nark_square/IMG_14801_zpsba203ea2.jpg

And think I'll need a better catch tank rather than the yoghurt pot that's on it at the moment

https://i1275.photobucket.com/albums/y459/nark_square/IMG_14861_zpse4f06c37.jpg

On the flip side, exhaust cleaned up and fitted well, beefcake.

https://i1275.photobucket.com/albums/y459/nark_square/IMG_14811_zps268dbec0.jpg

And new air filter fitted.

https://i1275.photobucket.com/albums/y459/nark_square/IMG_14841_zps760f8069.jpg

Sneak peak of new colours, with skateboard wheels fitted as bobbins to the front axle.

https://i1275.photobucket.com/albums/y459/nark_square/IMG_14631_zps9bc31309.jpg
____________________
You ain't a has been if you never was

[ride_to_die]

'kin hell that's not bad considering the track time.
____________________
I'm not here for a long time, I'm here for a good time.

[ride_to_die]

Use of skateboard wheels is ingenious.
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I'm not here for a long time, I'm here for a good time.

[bikertomm]

Brilliant, I would love to get into this at some point, bet that's great smiles per £.


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07' Honda Hornet now full powaah! My guide on performing an oil change!

[Ste]

I'm liking the professional touches such as the yoghurt pot.

y u no bcf sticker?

[Aff]

Following with interest.

I will be getting my first taste of pitbike supermoto on Monday night (thanks G), then hopefully doing matchams next year if all goes to plan.
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Current Bikes:Honda 929RR Fireblade, Honda CD200 Benly (Project), Stomp Z2 140
Electric Bike Project

[garth]

[-Monty-]

Interesting stuff. Thanks to G, I also will be giving this a go on Monday. Can't imagine I'll be getting into the racing just yet due to costs and such but am keen on it at some point
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Present: [Kawasaki ZX7r][Suzuki DRZ 400s]
Past: [Honda PCX 125] [Yamaha RXS 100] [Honda CB 500] [Triumph Speed Four] [Honda ST1100 Pan European - Po-Po Edition]

[binge]

Nice work dude!

I know matchams are very tight on their regulations.
Not sure if they've started allowing Z40 cams to be fitted like some of the other race series'.

Sneaky little mod is to fit the inlet valve out of a 125 big-valve engine, into the exhaust port of the 140.
Impossible to tell, but improves power quite noticeably.
Valve goes straight in, but clearance is next to nothing to set-up is vital.

If you wanna get really nitty about it. Get the bike over to OORacing and have it set up on their dyno.
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- Honda XL125S - CBR400 NC29 - VFR400 NC30 - CBR400 NC29 - TL1000R - TeeZeR Pit! - Bandit 12 - YZF450 - LuckyMX125 Pit! - Demon X XLR 140 Pit!
- Stomp KZ 160 Pit! - Demon X D-link 140 Pit! - CRF50F Mini-Pit - MonsterMoto 155cc MiniSM - Honda Chaly 150cc - Yamaha 98' R1
- Honda Chaly 140cc - Thumpstar 190cc 4v MiniSM - Aprilia RS125 Pit-Bike -

[garth]

Ah, not really interested in cheating to be honest, just want to be on a level playing field like everyone else!

Z40 cam is allowed and I have fitted along with springs, didn't make a lot of difference though.
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You ain't a has been if you never was