A mate and I have just installed a genuine HRC kit to my bike. It is the Australian variant that comes without the primary drive and jetting kits. I had the choice of a White Bros. 1650 camshaft or the HRC kit camshaft, we consequently went with the WB option as it physically appeared to be a more aggressive unit. Our assesment of this was basically done by doing a side by side visual comparrison, hence noting that the WB unit had sharper ramps, and I'm led to beleive that both have similar lift as they allow use with standard springs, retainers, and guides. Some time ago Rich mentioned having run a cam doctor over the HRC unit, any chance of those results Rich?
It was also suggested that 40thou shims be used under the large valvesprings in place of the originals to preload the large springs. Is this a common mod or should I look at just buying some R&D or aftermarket valvesprings?
Lastly, the stock carb is currently being used and we're going to start at the suggested 65,165 jetting and go from there, however I have heard that HRC had a different/modified needle, and in addition to this Scott summers is reputed to have moved material from the centre flat section of the needle to fatten up the mid range some, any thoughts on this?
Thanks.
It was also suggested that 40thou shims be used under the large valvesprings in place of the originals to preload the large springs. Is this a common mod or should I look at just buying some R&D or aftermarket valvesprings?
Lastly, the stock carb is currently being used and we're going to start at the suggested 65,165 jetting and go from there, however I have heard that HRC had a different/modified needle, and in addition to this Scott summers is reputed to have moved material from the centre flat section of the needle to fatten up the mid range some, any thoughts on this?
Thanks.