Bucket rules, excerpt from MNZ handbook

[F5 Dave]

There has been some questions re the rules, so I stumbled accross the electronic copy the other day. Here are the main ones:

Actually I touched up the change to 150cc 4 stroke as has changed since last handbook.


Page 101

CHAPTER 24

24 ROAD RACING – MINIATURE

24-1
The Miniature Road Racing class or `Bucket Racing’
as it is also known, shall be deemed to include solo
motorcycles and sidecars.

24-2
Motorcycles Technical:

24-2-1
Solo motorcycles shall have two engine capacity
classes:
F4 2 stroke 55-100cc
2 stroke 55-125cc air cooled
4 stroke 55-150cc

F5 2 stroke 0-50cc
4 stroke 0-100cc air cooled

24-2-3
The maximum capacity for rebored engine shall be:
F4 2 stroke 55-100cc - 104cc
2 stroke 55-125cc air cooled - 130.5cc
4 stroke 55-140cc - 150cc

F5 2 stroke 0-50cc - 53cc
4 stroke 0-100cc - 104cc

24-2-4
Engines must be derived from non-competition
motorcycles. Motocross, Road Racing, Enduro and
Go Kart motors and transmission parts are not
permitted. There shall be no restriction on the make,
type or design of carburettor, ignition, exhaust,
piston, cam, valve springs or cooling system except
for class eligibility. All engines must be normally
aspirated except F4 4 stroke engines of less than
100cc capacity, which may be turbo or supercharged.
F4 2 stroke engines over 104cc are restricted to
carburation equivalent to a single 24mm carburettor,
F5 4 stroke engines over 53cc are restricted to
carburation equivalent to a single 20mm carburettor.

[FROSTY:Me]

Dave --Ill cut n paste that into the -wanna go racing thread

[F5 Dave]

Good man,
if it gets enough hits then someone should sticky it.

[Bert]

Good work Dave,
maybe you should add the requirements for nylon (even though its a local requirment), and other groups ie: auckland and christchurch could add their requirments as well.

ps found a new frame but do you know anyone that might have a CDI ?

Brent

[froggyfrenchman]

Beauty! my buckets not only a winner, but fits into all the rules too!

[Sketchy_Racer]

Good work Dave,
maybe you should add the requirements for nylon (even though its a local requirment), and other groups ie: auckland and christchurch could add their requirments as well.

ps found a new frame but do you know anyone that might have a CDI ?

Brent

what cdi do you need??? i may have one (i think) its for a ts 125

[Bert]

what cdi do you need??? i may have one (i think) its for a ts 125

I thinking about replacing it with a MX one (used to have one, it hasn't really run well since).

[Sketchy_Racer]

oh cool.... yea my RG100 used to have a CR 125 ignition and flywheel etc.... did work really well

[F5 Dave]

my only suggestion is send the RM stator/flywheel & CDI up to this guy I mentioned & he may be able to repair it. Seems a bit more clued up than the average rewinder. The TS ones aren't worth continuing with.

J.Halsey Rewinds
49 Mellons Bay Rd
Howick
Auckland
0-9-534 4161

[speedpro]

Toss the TS ignition in the bin. A good CR80/125 or YZ80 ignition sort of thing will get you going good. Much more midrange power will be available with the extra advance from the MX ignition in the midrange. On the dyno I got about 30-40% in the middle with no other changes. For info, I've had really good service from I think it was Tauranga Rewinds or something like that.

[Bert]

Toss the TS ignition in the bin. A good CR80/125 or YZ80 ignition sort of thing will get you going good. Much more midrange power will be available with the extra advance from the MX ignition in the midrange. On the dyno I got about 30-40% in the middle with no other changes. For info, I've had really good service from I think it was Tauranga Rewinds or something like that.

Cheers Guys I'm getting on to it. Is there anyone that tests CDI's ?? or anyway to test them?

anyway looking forward to next season. damm hooked again.... Its just too much fun...

[speedpro]

You need to find someone with an ignition dyno. Pete Sales may have one and I think Wayne Wright(Wobbly) has one. Basically it's just a machine they can mount all the bits onto and give it a whirl(shirl). Really useful for testing advance curves as you vary the speed.

[k14]

Cheers Guys I'm getting on to it. Is there anyone that tests CDI's ?? or anyway to test them?

anyway looking forward to next season. damm hooked again.... Its just too much fun...

If you can find a workshop manual they usually have the resistances you get between each pin of the cdi so you can test it to see if its in the condition that it should be.

[Bert]

If you can find a workshop manual they usually have the resistances you get between each pin of the cdi so you can test it to see if its in the condition that it should be.

cheers I had tried that in the past - with not much joy, the one I've got (cdi) seems to drift under load ?????. - think it should be added to bin, along with the TF bits and start again.
So If anyone wreaking a MX then drop me a line.
though has anyone tried a kt100 gokart system on a bike ??? nice and simple looking.

[Bert]

You need to find someone with an ignition dyno. Pete Sales may have one and I think Wayne Wright(Wobbly) has one. Basically it's just a machine they can mount all the bits onto and give it a whirl(shirl). Really useful for testing advance curves as you vary the speed.

Ignition Dyno - so in theory you want to run the ignition through verying RPM, and data log the spark and the location (around the 360), plus the Rpm is this correct ????.
- thats a good use for my of my old dataloggers. - i might follow that one up. cheers speedpro.



A new summer project for the capible:

http://pages.quicksilver.net.nz/geof.../DIY_dyno.html