Hey guys, love my Grom but would like a little more top end speed. I weigh about 180 lbs and with my Zoom exhaust and Chimera intake I am toping out around 60 mph. I have done other upgrades which has made the bike a little lighter but that is about it for performance.
I only want to own one bike at a time and was thinking about selling my Grom to my son and getting a newish Yamaha RS400 or something similar. It's almost twice the weight of the Grom and likely not as much fun. I mostly use the bike for short trips on back country roads but also commute with it occasionally. Speed limit on my commute is 50mph so I can keep up with traffic but just barely. My wife and I fit fine on the Grom as she is only 90 lbs or so.
The other option I was considering was a big bore kit. Anyone try that? With a 149CC BBK would I get a top end closer to 70 mph? I wish there was a complete kit with everything you will need. Is the below list missing anything?
Anyone have any experience with reliably with the BBK?
Any way to scale that list down to around $500-$600 and still get a noticeable power improvement?
I don't think changing my sprockets would give me any higher top speed as 5th gear is mostly an overdrive. I would also like a little more speed climbing hills.
Thanks for any help or suggestions.