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Remapping
Classic MX
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| It was originally planned to build
this bike as a replica of one of Andy's championship winning CR's
but, during the build the bike has been sold to someone.
Accordingly, the bike will now be to it's new owners requirements.
And following a recent change in the AMCA eligibility rules the bike
has been ported to get the best results from a non- reed valve
barrel, as you can see the transfer ports have been slightly
enlarged and matched to the Wossner piston's cutaways. |
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The barrel has been re-bored and
honed to take the new ceramic coated piston and the sharp edges of
the exhaust, inlet and transfer ports have all been radiused to
avoid premature ring wear. |
| The bottom end of the engine has
also been powder coated black, treated to a re-conditioned
crankshaft with new con rod, main bearings and seals. While the gear
box although still a standard Honda box has had some of Andy's modifications
to improve gear selection. However, although it was originally
planned to fit a digital PVL ignition system, in the interests of
cost the standard Honda points system has been retained. |
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With the engine completed and
re-fitted to the chassis the new Mikuni carb can be fitted using the
original intake stub and rubbers. Although there is nothing wrong
with the original Keihin carb the more modern Mikuni delivers a
better mid-range and needle and jets are much more readily
available, making trackside adjustments a lot easier. |
| The bike is now starting to take
shape, just requiring the seat, rear wheel, exhaust and handle bar
controls to be fitted before it can be started up and set up ready
for delivery to its proud new owner.
Part 7
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