Site Update – New Website Design Effort Underway 2 Jan 2013 | 05:27 pm

1/1/2013: This website is currently being re-constructed at www.sohc4.com. As pages are added to the new site, they will be removed from this site. When the transition is complete, both www.sohc4.net ...

1976 Honda CB550 Top End Rebuild Video Series 14 Jul 2012 | 12:30 am

This is a video series by youtube member SocoMoto. Part 1: gaskets, rings, o-rings and valve lapping Part 2:  Honda 1976 CB550 gaskets and piston ring installation Part 3: cylinder jugs head nuts b...

CB750 Engine Differences by Year and Model 8 Jun 2012 | 10:31 pm

This is from a post to the SOHC/4 Forums by HondaMan. Starting from CB750K0 sandcast before S/N 4000 (approximately): Cams lost 2 degrees duration and 0.25mm lift before sandcast stopped. In K1, the...

CB650 Cafe by Ugly Motorbikes of San Diego, California 23 Feb 2012 | 02:07 am

Ugly Motorbikes of San Diego, California found a partly stripped CB650 in a parts warehouse and turned it into this Cafe Racer.   The blog page linked above details the build from start to finish.

CB550 – PD46A Carb Rebuild Guide 6 Feb 2012 | 02:01 am

PD46A Rebuild Guide This guide was written by forum member, Brian B.  It is an excellent step-by-step carb rebuild guide with photos.  The PD46A carbs were used on the 1977 and 1978 CB550′s.

Moto Hangar customs 4 Feb 2012 | 01:57 am

Moto Hangar is a shop located in the Northern Virginia suburbs of Washington, DC. Here are some examples of their SOHC/4 customs. This is a 1976 Honda Cb750 built for a customer. Modifications includ...

CB550 Cafe Racer from Steel Bent Customs 14 Nov 2011 | 12:23 pm

1975 Cycle: Honda CB400F Super Sport (test) 20 Aug 2011 | 10:27 am

Put bluntly, the most impressive thing about the new Honda CB400F is this: it’s really fun.  Like all Honda factory products, the 408cc six-speeder has been sanitized and polished to a glossy civility...

1989 Cycle: 400 Fours, Then & Now (test: CB400F vs CB-1) 20 Aug 2011 | 10:21 am

A comparison between the CB400F and the CB-1, Cycle 1989 Think 1975, that was the year Honda introduced its fist made-for-America motorcycle, the venerable Gold Wing, and launched a touring dynasty. ...

Honda Motorcycle Electrical Systems 20 Aug 2011 | 04:16 am

Published by American Honda Motor Company as part of the Honda Technical Series in 1977. The electronic copy of this publication is broken into sections to enable fast access to specific areas of int...