Honda-SOHC

changed the oil pump today went better than I thought. the missing bolts were just missing I thought they may have been stripped threads but all OK, just need to get a 6x50 flange bolt are these available at any fastener dept. or are the specific to Honda? Thanks to trigger for the fefurb on my pump and advice. May not be a big deal to many of you but its my first time with a Honda 4. 

As title its on one of the oil pipes from tank to engine

Hi sorry for all the probably dumb questions. First a little history on my honda apparently it has previously been on on display in some antique shop in London for quite a few years, this is probably why most of the oil seals were missing (something I am finding out as I work through the various leaks. I am now at a stage to replace the oil pump. investigating the the oil pan some bolts are missing (although amazingly enough it doesn't leak). I read somewhere all the bolts are not the same length, could someone explain what length of bolt goes where, before I dismantle it as probably the bolts will be wrong, judging by experiences so far. Why they are missing I will have yet to find out LOL.

That will be a JIS M5 but, not easy to helicoil . Measure the depth of the thread and see if there is any thread at the bottom. Someone may have put a screw in too short.

The thread length is 25mm. It was a job I wished I had never started lol. sometime in the past some owner had decided to use an o ring and a copious amount  of black sealant, wich at first I thought was the old seal, however after trying to remove it realised it was black sealant cleaned it up as best I could put the new seal in but then the fitting didnt quite go in so tapped the seal as much as I dare until I could get the cable in with the original bolt for now but it is a tight fit only bonus is its not leaking yet!!!

I am looking for new exhaust gaskets I notice some are alloy and some are copper, which is the better in your expert opinions.

Just for information The Rules Governing Motorcycle Plates
To begin with, all single row motorcycle plates are illegal.  The government makes this very clear by pronouncing that, “Characters on Number plates must be set out over two lines and must be displayed on all motorcycles registered on or after 1 January 1973.”Bikes that were registered before the 1st of September 2001, can display a three-row number plate. But this doesn’t suit most bikes and therefore is not a popular option for most bile owners.

All other bikes have to follow a very strict 2-row rule for motorcycle plates. It is also mandatory for this plates to be displayed on the rear if the bike. If your bike was registered before 1st September 2001, you may also be able to place a number plate on the front as well. These rules apply to tri-cycles as well.

This particular date of 1st September, 2001 is important because it also marks the date that small changes to the rules governing motorcycle plates were also announced. These small changes affect the character sizes and the overall size of the plate. They basically tell you how big or how small your number plate can be

And the font to use is called Charles Wright if making your own

That will be 4.8x14.5x4mm Nitrile Rubber Rotary Shaft Oil Seal Springless Design VC Style 

Thank You