Honda-SOHC

At last! Someone more local (than Yamiya) is starting to produce this stuff again.

Having swapped messages with AshimotoK0 on sohc4.net recently, I was spurred into updating www.nirvana-motorcycles.com to add our K0 to the gallery section.

This bike was featured in CB July 2009 - some of the pictures were taken by looking over the photographer's shoulder during the shoot (copy the professionals!)

Take a look

Hi and welcome.

The 550K had 4-4 as standard and you are correct - the PD46s were completely different from the 500 and 550F carbs (which were 627B)

The Marshall exhaust will breathe far more easily than the stock system and will cause the engine to run very lean - you'll have massive flat spots in the performance. You will need to increase the size of the main jets to get flat out performance but will probably have to increase the pilot jets as well (and fiddle with the air screw).

It is not easy and can only be done by trial and error.

Go to www.sohc4.net and look up a member called "Two Tired", he is generally accepted as the "global" expert on rejetting a 550. There are loads of threads on there about this.

Steve
(use the same name when you register so that we recognise you!)

I directed Anders here from the Honda Owners' Club forum. I told him that he'd find the experts on here.

Don't let me down guys...   

VAT bill.

 

There's a guy on sohc4.net who makes phenolic pistons (he turns them down from automotive parts). They come highly recommended by our US cousins.

There's a FAQ on sohc4.net that shows how to open up the coils and repair them with new leads.

Also, some on there have successfully used CB750/900 DOHC coils that have detachable leads (but need a bit of metalwork/bracketry to fit)

Hi James.
As you're in the USA, register with www.sohc4.net and ask them the same question. There will be many more members in your neck of the woods - this site is mostly UK-based. (We still want to hear from you though!)

Steve