Norton ES2 race bike .

Hi , this is a friends son Tyler, racing a es2 he's done some racing in Europe but found, you just need lots of money to compete , the bike belongs to someone else I think it's got magnesium cases and good for around 135 -140 mph.

Shelby-Right said:

Hi , this is a friends son Tyler, racing a es2 he's done some racing in Europe but found, you just need lots of money to compete , the bike belongs to someone else I think it's got magnesium cases and good for around 135 -140 mph.

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The bike was built and developed by Peter Lodge (Auckland, NZ).

Photo of it at this year's Manx. Riden by Mike Brown. 2 third places and one fourth so far. Laps around 111 mph I think.

There is an ES2 race bike which Bob Rosenthal has been riding in Historic races in Victoria. He is the current 500cc historic champion. I think a lot of people get carried away with short stroke, double overhead cam bullshit. A short circuit is not the IOM. Anything can be made to go quicker.
When they tune the ES2, they get the jetting right, then put the bike on the dyno and adjust the ignition timing until they get maximum torque. I think they use an oxygen probe for the jetting. I have seen Bob lap a whole field in three laps of a 5 lap race on a 2 kilometer circuit.

I am open to correction here, but I understand that the ES2 that Bob Rosenthal rides in historic races is a methanol fuelled machine, whereas the ES2 that Mike Browne rode in the I.O.M runs on petrol.

Snotzo said:

I am open to correction here, but I understand that the ES2 that Bob Rosenthal rides in historic races is a methanol fuelled machine, whereas the ES2 that Mike Browne rode in the I.O.M runs on petrol.

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Hi Ron.

Definitely petrol in the Manx yes.

When the IOM bikes are back in NZ the boys continue to run them on petrol so any tuning is relevant for Europe. The NZ and Ozzie based bikes usually run on methanol. (except for clubmans class of course)

The NZ festival is on next weekend at Manfeild. Bill Swallow is here visiting his grandchildren and will ride the Eldee 250. I'm going to Wellington today and will fit the mixture meter and we will test the mixture on Thursday practice. They have been using Gardener carbs but I think Nick is planning to use a GP. I don't care for the things. The float bowls seem to be very fussy. My bike won a lot of races using Concentrics while the guys were messing with old GP carbs in the pits.

But anyway we shall see what happens.