Drivetrain Modifications

[Like most pages on this Web site, this page is still a work in progress. Please check back later for updates...]

Chain and sprockets

Chain modifications generally fall into two categories—replacing the OEM chain with a high-quality aftermarket chain and changing the chain size to a lighter and/or stronger size. Sprocket modifications are usually done in order to alter the final drive ratio.

Changing Chain Size: Many bikes, including the NC30/35, came originally equipped with 525-size drivechains and sprockets. Oddly, however, many aftermarket 525 chains are not as strong as aftermarket 520 chains, so in addition to a small weight savings (plus that from switching to an aluminum rear sprocket), changing to a smaller link size can actually be a strength upgrade. Compare the tensile strength specifications for different chains and you might be surprised. (Note: NC30s use the same front sprocket as the US-spec CB-1 and the same rear sprocket as the RC30.)
Changing Sprockets: To see what effect a given sprocket combination will have on your bike, see the Final Drive Ratios Chart.

Transmission and Shifting

For improved shifting, consider installing a shift kit. See the Honda Gearshift Drums and Modifications page.

Clutch

Modern Honda clutches are pretty robust and, unless subject to abuse, last a very long time. Most VFR owners are unlikely to need to replace a clutch for almost as long as they own their bikes; most "clutch problems" are actually hydraulic or adjustment-related. That said, there are aftermarket clutch parts available, such as the kevlar clutch disks and heavy duty springs available from Barnett and EBC. NC30s can, however, benefit from certain clutch upgrades, particularly if they are raced or often ridden hard, partially due to the relatively high first gear on these bikes (inherited from the RC30). See the NC30 Clutch Upgrades page for some info on upgrading NC30 clutches with heavier duty Honda OEM or aftermarket plates and disks.