Results on my Stock 1965 XLCH, with stock bore/stroke, P cams, Fixed Magneto, SU Carb, 2" pipes & -62 mufflers w/ 3/4" hole reamed in them.
This is a VERY good running bike, so I believe this is a good example of a stock 900.
You wiil see a couple blank areas in the curves, I believe this is due to the RF issues I am having w/ the electronics and the magneto ignition.
Im sure I could get rid of the slight torque dip around 3200 w/ some tweaking.
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Here is another run w/ a different exhaust.
This exhaust is a unknown brand 1.750" pipes w/ combined mufflers.
The angled baffle plate has been reamed w/ a 1" thru hole.
Notice the max TQ and HP are about the same but this exhaust has a much more noticeable dip in the 3200 range.
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Here are some results of Harley PB cams in my stock 900.
First let me say these cams were nearly impossible to get tuned, and this run shown still did not have a optimal ARF curve.
I had been doing all my runs for comparison w/ the same parts.
Well the SU w/ only a main circuit and a needle was not up to the tuning challenge.
I installed the trusty CV w/ much more tuning capabilities and although I did get better results, tuning the AFR w/ these cams was still a bitch.
It is richer than necessary from 2500 until about 4000, then starts going lean up to 5500. I even had to shim .200" under a NOKH needle to get the midrange decent.
I have no idea how anyone back in the day ran these PB cams on a stock 900 w/o issue, especially w/o a AFR monitor and dyno.
Im sure they do work well if setup correctly and w/ the right combination.
If I intended on running these PB's I would spend more time adjusting and possibly try some other pipes, I think a 2:1 would definitely help w/ these cams.
Im sure this combo could make more power if you really wanted to spend time w/ setup.
There is a gain and a loss as you will see.
I will be sticking w/ the original bolt in no fuss P cams, that give awesome results for a stock cam IMO.
Stock 1965 XLCH, with stock bore/stroke, P cams, Fixed Magneto, SU Carb, 2" pipes & -62 mufflers w/ 3/4" hole reamed in them.
The only differences in this run 407 (orange) is the PB cams and the CV carb .200" shim under NOKH needle 46 pilot / 185 main, stock spring.
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This is a VERY good running bike, so I believe this is a good example of a stock 900.
You wiil see a couple blank areas in the curves, I believe this is due to the RF issues I am having w/ the electronics and the magneto ignition.
Im sure I could get rid of the slight torque dip around 3200 w/ some tweaking.
Here is another run w/ a different exhaust.
This exhaust is a unknown brand 1.750" pipes w/ combined mufflers.
The angled baffle plate has been reamed w/ a 1" thru hole.
Notice the max TQ and HP are about the same but this exhaust has a much more noticeable dip in the 3200 range.
Here are some results of Harley PB cams in my stock 900.
First let me say these cams were nearly impossible to get tuned, and this run shown still did not have a optimal ARF curve.
I had been doing all my runs for comparison w/ the same parts.
Well the SU w/ only a main circuit and a needle was not up to the tuning challenge.
I installed the trusty CV w/ much more tuning capabilities and although I did get better results, tuning the AFR w/ these cams was still a bitch.
It is richer than necessary from 2500 until about 4000, then starts going lean up to 5500. I even had to shim .200" under a NOKH needle to get the midrange decent.
I have no idea how anyone back in the day ran these PB cams on a stock 900 w/o issue, especially w/o a AFR monitor and dyno.
Im sure they do work well if setup correctly and w/ the right combination.
If I intended on running these PB's I would spend more time adjusting and possibly try some other pipes, I think a 2:1 would definitely help w/ these cams.
Im sure this combo could make more power if you really wanted to spend time w/ setup.
There is a gain and a loss as you will see.
I will be sticking w/ the original bolt in no fuss P cams, that give awesome results for a stock cam IMO.
Stock 1965 XLCH, with stock bore/stroke, P cams, Fixed Magneto, SU Carb, 2" pipes & -62 mufflers w/ 3/4" hole reamed in them.
The only differences in this run 407 (orange) is the PB cams and the CV carb .200" shim under NOKH needle 46 pilot / 185 main, stock spring.
