cornishtwinspring Posted February 15, 2017 Report Share Posted February 15, 2017 Just taken the cover off to change oil filter on my sons 07 4rt and somebody has fitted a weight by welding it on!!! The casing has been ground to allow clearance and the pick up mounting holes lengthened for same reason. Any of you wise guys n gals know or heard of such a mod??? Quote Link to comment Share on other sites More sharing options...
jrsunt Posted February 15, 2017 Report Share Posted February 15, 2017 Never heard of one before. Is it noticeably different to ride? Quote Link to comment Share on other sites More sharing options...
cornishtwinspring Posted February 15, 2017 Author Report Share Posted February 15, 2017 Its definitely more docile on the throttle response, still crisp but not snappy, but more noticeable when rolling off the throttle,it rolls on as well as my 260.. Its 11oz heavier than my stock 260 flywheel. Whoever did the work obviously knows their onions , its very neatly done. Hopefully someone on here can throw some light on it. Quote Link to comment Share on other sites More sharing options...
stan wellback Posted February 15, 2017 Report Share Posted February 15, 2017 how about you throwing some flashlight on it ? Quote Link to comment Share on other sites More sharing options...
cornishtwinspring Posted February 15, 2017 Author Report Share Posted February 15, 2017 2 minutes ago, stan wellback said: how about you throwing some flashlight on it ? How do you mean? Quote Link to comment Share on other sites More sharing options...
jimmyl Posted February 15, 2017 Report Share Posted February 15, 2017 Maybe a john bliss mod or Martin Willmore. I have heard somebody talk about this type of mod - not sure wether on tc or at local events. i think old school mod as ptb mapping is less involved!! Quote Link to comment Share on other sites More sharing options...
cornishtwinspring Posted February 15, 2017 Author Report Share Posted February 15, 2017 I would agree James it certainly took whoever did the work a fair amount of time and effort,the 07 doesn't have a ptb and maybe at the time the mod was done a ptb was an expensive option?? Quote Link to comment Share on other sites More sharing options...
johnnyboxer Posted February 15, 2017 Report Share Posted February 15, 2017 22 minutes ago, cornishtwinspring said: How do you mean? Pics?? Quote Link to comment Share on other sites More sharing options...
cornishtwinspring Posted February 15, 2017 Author Report Share Posted February 15, 2017 Just now, johnnyboxer said: Pics?? Fraid I'm not that clever I'm afraid sorry. The weight is a band of steel the full depth/width of the flywheel approx. 2-5mm thick with holes in it (I'm guessing to balance it). The welds are equally spaced and exactly the same length on the outer face as you look at it fitted.. Quote Link to comment Share on other sites More sharing options...
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