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December 1st, 2004, 10:58 AM   #11
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Madero

Thanks for the info' I did a quick calc' and by my reckoning if the stroke is 10mm bigger than standard i.e. 92mm the bore for 730cc is 100.5mm. As you say about + 10mm I am guessing that the about 730cc boys are using a standard bore after market piston and getting all the cc's on stroke? Thanks again.

Dale

Thanks for all your patient question answering, you are a mine of info' on Husabergs. I took a look at your gallery and it was most informative. The good mr. schwim has set me up a gallery and I have put some picies on it.

The 2003 650 came with a 39mm Delorto, I am going to put a 42mm Mikuni pumper on it as we want the pick-up out of corners the pump will give and bigger venturi in view of the 100 extra cc's. This is a good idea right??

Right my picies.........

1) Side view of 105mm piston - compression height 28.9mm form pin centre to top - 5.5mm taller than standard berg.

2 & 3) Top and Bottom, rings and 24mm pin.

4) Comparison of a 20mm pin to 24mm pin (20mm in picture not a Berg pin) - Note the Spiralocks next to the Circlips. Spiralock are much better they never break!!

5) Piston on Rod - a total of 12.5mm taller than stock. Compression difference 23.2mm - 28.9mm = 5.5mm + 5mm Long-rod + 2mm Rad increase on stroke (86mm up from 82mm).

6) The Rod - I like longer rods keeps the side load and angularity down. Standard Berg max rod angularity 17.86 degrees, my 750mm with long rod 17.88 degrees

Thanks for all the help guys.
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December 1st, 2004, 01:57 PM   #12
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Pictures of my 114mm pistons in my gallery if your interested.
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