New Member Introduction

[Grimes]

Hello all. I just bought a 1972 Honda cb350f that was in storage for several years. I've torn apart the carburetors (my first time doing this) and am cleaning them for re-assembly this week. I plan to replace the stock airbox and filter with Uni PK-4 filters. Many forums talk about the need to change the jet sizes in the carbs when making these filter changes, and the description of the filters themselves say as much. However, I've been unable to get a clear answer on which jets to try first to have the best shot. Anyone know?

Also, when losing the stock airbox, what are some solutions for the wiring that is attached to the side and battery box. I plan to run the stock side covers, so...

Anyway, glad to be here among so many enthusiastic and knowledgeable motorcycle riders. Cheers.

 

[whynot]

Welcome .......and pics pleezz.......

I've got a 74 350F.

 

[coalnation]

Welcome to the site! I also have a CB350F!

 

[AlphaDogChoppers]

You don't have to remove the stock airbox. Leave it in place and use it at a place to put stuff.

If memory serves, you will need to start at somewhere around 195 with the main jet.

I did a CB400f with K&N pods and used this jet kit:
http://www.ebay.com/itm/like/380900289782?lpid=82

I used the richest jet in the kit, and raised the slide needles one shim. The bike ran beautifully. It had a bit of a flat spot around 1/4 throttle before I raised the needles.

I recondition float needles and seats. I use a Q-tip stick with a sharpened end with valve grinding compound to clean and smooth any irregularities in the seat. If the needle is not a viton tip, I lap it in the seat with a little grinding compound, too. Finish off with some metal polish on a Q-tip to give a final cleaning to the seat. Put a new O-ring on it. Lube the O-ring with a little silicone grease before installing. Then, set your float heights.

You MUST synchronize your carbs and retune the idle air mixture screws. If you don't have the tools or skills to do this, then take it to a shop that can.

 

[Vintagehonda750]

welcome

 

[stowaway117]

i run uni pod filters on my 350f. with a four into 1 exhaust my jetting is;


80 main jet
40 slow jet
needle shim at 3rd notch from the top
air screws 1.5 turns out

she screams like a banshee.


if your looking to hollow out the rear triangle for that real cafe'd look and shave some weight by removing the stock airbox and all that crap thats in there, I welded a 1/8 inch steel plate on the bottom of the frame rails under the seat. this probable wont work with the stock seat but if your putting a cafe seat on it all of the electrical will tuck/ cram in there nicely. you could also cut the subframe off, weld on a seat hoop (DCC has some bitchin ones) weld a plate under that as well and youve got a sweat spot for a little antigravity 4 or 8 cell battery under your seat cowl.

im on my second 350f ground up rebuild, message me and ill help as much as i can. cheers mate.

edit: saw that you want to run the stock side covers. alphadogchoppers has the right idea, just remove the plumbing going from the stock airbox to the carb and the pods should fit. leave your electrical where it is.