How to let GS to have higher rpm?

[Dink]

Interesting read, I'm at least the 3rd owner on my bike and it doesn't hit the powerband till almost 8000rpms and then it's HOLDON for a whole 1k and I have to back down. I did notice that the heads are of a different design than what my Clymer book says they should look like. Instead of having boots that bolt up to the head it has tubes cast directly in the heads and then it is just some rubber tube that is clamped to that and my vm33s, any ideas?

What Bike?? sounds like a 78 or 79 GS1000 or 850, it may have the later 80 on model head on it.
Dink

[thr3shold]

Ooops, I've got a '80 1100E. I'm waiting for my Tracy fairing to come in the mail :-D \\/ \\/ \\/

[sharpy]

Revs

Ive seen 11,500 rpm on my tacho but that was after a mate asked me what it revs to on a rolling burnout. Now i just let it grunt and play with the throttle which is more stylish. And no it isnt a crap tacho thanks very much LOL

[Nerobro]

I'd admit to pegging the tach on my 550 a couple times. With no ill effects. :-) I just wouldn't want to run the motor there all the time. The bottom ends can handle it. The top ends are the problem.

[ap72]

weight reduction and "old tech" is not the major concern here really. You could build a gs engine to go to 12000 rpm, however you would need a larger camshaft and a VERY well ported head along with new carbs and exhaust just to get adequate (not great, but adequate) airflow. Then comes valvetrain stability- very high spring pressures which will wear fast, but are required to avoid valve float. Next comes the crank- it would be easiest just to build a billet crank and go from there (welding and cutting etc. could work, but would not be the safest routine). The pistons from Wiesco could hold up to it, but the connecting rods would need new bolts, and shotpeened at the least- again billet rods would be safer. The ignition MAY actually hold up to it, but would not be optimal. This crap about "30 year old tech" is just that- crap. Hell a gen 1 chevy 350 has WAY older "tech" than that and yet you can take stock parts on one of those to 7500 rpm (normal facory redline is about 5,000).

Its not impossible, its not even all that hard, its just expensive and not practical for the street (which is where most of us drive our bikes).