Charging System

Modifications

Electrosport

Electrosport sells stators which claim to increase power output over stock. Increased wattage at high RPMs is gained at the expense of wattage at lower RPMs. If a bike is to be ridden around town regularly, the stock stator may be preferred. An image was posted by an Electrosport employee to this thread which shows the output trade off of their KLR650 stators:

Electrosport Warning

There appear to be several accounts of Electrosport products failing due to what appears to be poor construction.

• Alternator Stator Failure and Repair found here.
• This post in the ADV Rider KLR650 stator thread tells of bad customer service and failing products.

Personally, I put an Electrosport regulator/rectifier on my VFR-750 and it was terrible. The charging level fluctuated badly (my headlight would become noticeably brighter, then dimmer) and it failed completely after six months.

Regulators

This post on VFRDiscussions.com recommends Yamaha R1 regulators from 2004 and later:

"lots of folks with R1's from around 03 and earlier had RR problems, but the 04's and up the problem was corrected."