high comp head
changing the head on my rapido from a standard one to one of these from AFR just ordered it http://www.afrayspeed.co.uk/index.php?p ... buteID=HEA can I expect any improvement speed/acceleration wise or is it just going to be harder to kick up? I'm already thinking may drop the timing back to 17.Any advise or experience of these appreciated,thank you.
I am playing all the right notes, but not necessarily in the right order.
Originally one of these http://www.afrayspeed.co.uk/index.php?p ... tributeID= 8:1.You may wonder why I'm changing it,its not through choice,doing plug chops over the weekend (see http://scooterotica.org/forum/viewtopic ... 21084\)and I fecked the thread up for the sparkplug 
,need the scoot for next weekend so rather than mess about with helicoils etc ordered a new head.I'll get the other one done at a later date.
,need the scoot for next weekend so rather than mess about with helicoils etc ordered a new head.I'll get the other one done at a later date.I am playing all the right notes, but not necessarily in the right order.
Not a high comp head but its higher than you have been running. I'd drop the timing a bit and definitely check the jetting.
If you chance it, you may get away with it but a different head can significantly alter your engines performance/ jetting /temp etc, especially if your pushing your compression up a bit.
If you have been running a very low comp head like 8:1 and your going higher, i'd check all your settings thoroughly.
I ran one of those 8:1 compression heads on my monza for a while because i liked the thick sealing area and then i went from that to an MB 10:1 compression head and it felt like a bloody rocket compared to running the old AF one.
If you chance it, you may get away with it but a different head can significantly alter your engines performance/ jetting /temp etc, especially if your pushing your compression up a bit.
If you have been running a very low comp head like 8:1 and your going higher, i'd check all your settings thoroughly.
I ran one of those 8:1 compression heads on my monza for a while because i liked the thick sealing area and then i went from that to an MB 10:1 compression head and it felt like a bloody rocket compared to running the old AF one.
Cheers nelson pk,that's what I was after, I have ordered various head gaskets so I can get the squish right and I think its back to square 1 with the carb.timing wise I'm still using 12v AC static ,so I think I'll put it back to 17 to be on the safe side.Thanks again.
I am playing all the right notes, but not necessarily in the right order.