Originally Posted by Rapid Dog
Not sure about this, guy I bought it from used the word Rennsport. That said I did check the number but I don't recall, but I think it was a 336 stamped on the end.
Snowbum briefly talks about it hear: Mods
At any rate, my bike kicks in at about 4Krpm like no other airhead I ever rode. It's a real blast to ride.
That's right. The 336 cams for bikes made after
'79 had 336 stamped on the end. Stock 308 cams have 308 stamped on the end.
What sort of top end are you using on your bike? iirc, US model R100GS's and PD's used a small valve head and 32mm carbs. Is that the arangement on your PD? Have you done anything to increase compression over stock? These motors really cry out for more compression and heavier breathing.
With the 1050cc Venolias and modded '77 RS heads I'm running about 12:1 cr. With the stock cam it'll idle up a wall.
The high lift, short duration Andrew's cam should increase the midrange urge even further. I'll keep you posted.