TourMax SH640-12 Regulator Rectifier
- 68mm between bolt hole centres
- 5 wires
- Made in Japan
Regulator/Rectifier Fitting Instructions
When on test, 12 Volt batteries should show an output of 13.2 Volts. When the engine is running this would increase to between 14 and 15 Volts.
Yamaha and certain Honda motorcycle's use a three-phase type system, with a permanent magnet instead of an electromagnet, to regulate the current from the alternator.
Rather than controlling the output from the alternator, the excess voltage would be dumped by means of heat transfer.
To improve the transfer of heat from the regulator/rectifier you can use a silicone heat sink compound which is placed on the back of the regulator/rectifier and on the mounting point. Both surfaces must be clean for better contact and heat transference.
Also, to improve the earth of the regulator/rectifier, a cable can be introduced on one of the mounting bolts and connected directly to the negative terminal of the battery (earth side). This would eliminate the unreliable arrangement of earth fittings that are connected to various parts of the frame or motorcycle that does not always work. This type of earth is used as standard on some Yamaha and Honda motorcycles.
Before You Place Your Order...
- Note the image may not be exactly as item received and any slight difference will not be inferior or effect performance
- Check the fitment list to ensure this item will fit your vehicle
- When we refer to right or left, this is as you sit on your vehicle
- To find part by SKU, enter the number without "SKU" into the search box
- Products containing any fluid or hazardous materials, aerosols, batteries including large lithium jump starters cannot be shipped overseas due to courier restrictions although we can ship UK offshore and Scottish Highlands at higher shipping rates
- EU customers should check with your countries customs office to determine what additional costs such as tax or Import duties will be prior to purchasing. These charges are normally collected by the delivery company or when you pick the item up, they are not included in the item price or shipping charge on this website
All parts and accessories are brand new and include VAT where applicable.
Most parts are pattern or aftermarket although some will be genuine but are not always stated as being so.
The use of motorcycle manufacturers' names is for reference purposes only. We do not imply that the products we sell are made by or with the permission of the names listed.
Compatible Yamaha Motorcycles
- Yamaha SR400 (Front Disc) 2001
- Yamaha SR400 (Front Disc) 2002
- Yamaha SR400 (Front Disc) 2003
- Yamaha SR400 (Front Disc) 2004
- Yamaha SR400 (Front Disc) 2005
- Yamaha YFB250 FW Timberwolf 1997
- Yamaha YFB250 FW Timberwolf 1998
- Yamaha YFB250 FW Timberwolf 1999
- Yamaha YFB250 FW Timberwolf 2000
- Yamaha YFB250 Timberwolf 1997
- Yamaha YFB250 Timberwolf 1998
- Yamaha YFM250 X Bear Tracker 1999
- Yamaha YFM350 FW Big Bear 1997
- Yamaha YFM350 FWB Big Bear 1998
- Yamaha YFM350 FX Wolverine 1995
- Yamaha YFM350 FX Wolverine 1996
- Yamaha YFM350 FX Wolverine 1997
- Yamaha YFM350 FX Wolverine 1998
- Yamaha YFM350 FX Wolverine 1999
- Yamaha YFM350 FX Wolverine 2000
- Yamaha YFM350 FX Wolverine 2001
- Yamaha YFM350 FX Wolverine 2002
- Yamaha YFM350 FX Wolverine 2003
- Yamaha YFM350 FX Wolverine 2004
- Yamaha YFM350 U Big Bear 1996
- Yamaha YFM350 U Big Bear 1997
- Yamaha YFM350 U Big Bear 1998
- Yamaha YFM350 X Warrior 1994
- Yamaha YFM400 FW Kodiak 1996
- Yamaha YFM400 FW Kodiak 1997
- Yamaha YFM400 FW Kodiak 1998
- Yamaha YFM400 FW Kodiak 1999
- Yamaha YFM600 FW Grizzly 1998
