Like a lot of riders, I just want to see how much performance I can get out of the bike with compromising the mechanical integrity or life of the engine. Aside from that I can afford to find out as well so why not consider it. BTW, do consider that every modification that any person does to any bike is purely discretionary. Every bike comes from the factory 100% functional, no mods required. So I’m not sure that any reason for a mod whether it be for performance or aesthetics is any better that anyone else’s reason to do a mod.
The essence of my question is whether or not anyone has regretted completing that cam “upgrade”. According to the dealership mechanic, he’s known of instances 1st-hand where a cam upgrade or a big bore kit threw the tuning off on a bike to the point where the performance actual decreased either by way of lost horsepower/torque or starting/running reliability. Says he known of instances where as a result of completing an engine modification mechanics have actually “grenaded‘ an engine, whatever that means. His concern basically seemed to be with using non-OEM parts within the engine specifically. I’m simply trying to qualify what that mechanic said compared to other people’s experience. Just trying to do a little research in the efforts of protecting my investment and enjoyment. If I can reliably get the results I hoping for, then I would pursue that upgrade. However, as with all the upgrades I done to my bike myself, very few of them are as easy as 1, 2, 3 and no matter what the manufacturer claims, no parts are “universal”. I just what to assess how much of a gamble I would be taking. I don’t want to spend $2500 on a cam upgrade only to spend another $1800 trying to get it undone. Also, I found out the mechanic I was going to use for the upgrade is shit. I was told h’s ruined a few bikes trying to do engine modifications.
I remember when that same mechanic told me that I couldn’t run a 180 tire on the back of my bike without some modification. I thought he was wrong. All other accounts I came across online said that I could. I slapped a 180 (w/ white wall) on my Scout Bobber and ruined the white wall w/in the first ride. Perfectly brand new tire ruined! Seems everyone else was running their 180 tire on the OEM wheel which is not recommended because the narrowness of the wheel changes the shape of the tire effecting the performance of the tire and the bike‘s ride. I put my 180 on the recommended sized wheel (5.5) which gave the tire proper fitment, retaining the tire’s designed width. That was what that mechanic was warning about. Could I run a 180 on the rear… yes. Could I run a 180 on the rear w/o compromising the performance, no or not unless I modified the rear subframe which is what I ended up doing. Point is, just because a part is manufactured or a mod can be done doesn’t necessarily mean that it should or that it’s even safe. No one wants a mechanical failure at 90 mph or white going into a curve. It’s all about safety first then performance. BTW I do recognize that the skillset of a mechanic has a lot to do w/ the outcome of a modification. I do think it’s reasonable that some performance mods will actually void the warrant.