Exhaust Questions

[slash360-2]

  I have a 81 750C with stock 4 to 4 exhaust.There are pretty bad rust holes where head pipes meet mufflers.Head pipes are ok.What would you recommend.Mac has 4to1,and 4to2 full system, and slip on mufflers reasonably priced,and mivv has the 4 silencers for about double the full system price. If I go with mufflers only,how do I remove old ones? I got this bike for $500,it had been sitting in a garage for years.I did all the regular stuff,battery,carbs,tires,tank,and It's been running fine for last 2 years. Thanks for the help.

[gonebiking-2]

Good to know that there are still some stock 750s running around. Get some  penetrating oil and give the silencer pipes where they meet the header pipes a good soaking in the penetrating oil for about 30 - 60 minutes. Remove all the clamps , nuts and botls that secure the four silencers and with a bit of twisting back and forth they should all come off. They dont go that far onto the header pipes anyway, so getting them off wont be too much of a problem. Personally I would stick with the mivv silencers to keep the bike original as possible if you are intending to restore it back to its original condition. Remember that the original silencers are designed for better scavenging and performance than after market ones. This also means that the carbs will need to be re jetted and retuned to suit the aftermarket pipes. Bettter the devil you know then the one you dont. Your choice.

[slash360-2]

Thanks for the help. Looking at pipes on bike, I thought they might be welded together. I am also leaning toward keeping the stock look, but wanted to ask someone who may have dealt with the aftermarket pipes vs stock. Thanks again.The forum is great, Steve in NC.P8010248.JPG

[gonebiking-2]

Hi Steve. First of all let me congratulate you on a wonderful looking bike you have there. I`m not sure what model 750 that is , buts its a model that never came to Australia. Although looking at the motor , wheels front disc brakes etc they are the same as the Australian Model. I have different wheels to your bike in that they are the polished Comstar wheels. Looking at the exhaust system I would say that is a different system that Honda made for your model, but if you remove those shields ( normally held in by two largish Phillips screw ) you will find the clamps that go round the silencer where it slips onto the header pipes. Its just a mattter of removing those shields on either side, remove the clamps, give the silencers a bit of a twist back and forth and they will just slide off. They only go on about an inch and half - if my memory serves me right. Personally - and thats my own preference , I dont care much for after market pipes , and my reasons are based largely on the internal design of the pipes, in that I dont believe they are "tuned" for our bikes. From years of talking with friends that have fitted after market pipes, they have had no end of trouble in getting the carbs re tuned to suit the pipes .  As I said its a matter of personal preference. Better the devil you know than then one thats an unknown quantity. Let me know how you go.

[slash360-2]

Thanks for the congrats. It's my first attempt at a bike restoration. It's a 1981 750 custom, the fairing is a Vetter windjammer. It had lower units when I got it, but they seemed to block air from cooling the motor, and I didn't really like the look. Saddlebags are Bates and the rear luggage rack and case were actually offered by Honda as a stock option.I see alot of K models on the site,but I think the C model has more of the cruiser look. I think I'll ride it for awhile till I save up for new silencers.Thanks again, Keep On Biking!!!

[gonebiking-2]

 Its been a pleasure to be of some help. The Windjammer fairing was very popular in Australia, but rarely see them now days. Once my 750 is finished - in about 12 months, I`ll put it in on the forum. Then I`m going to use it as a show bike at auto shows , and by my self the ulimate tourer - the latest Goldwing. Yes I know in Australia its going to cost me $43,000 , but at my age I want something very comfortable for long distance touring, and as there is a dedicated Goldwing Club in Perth ( Western Australia ) we can all go away for several weeks, as most of us are now retired , including myself. But must get the 750 restored before I get the `wing - then nothing will get done. Keep the shiny side up and keep us posted on how you go with all the work you are doing on it. Its a nice bike ! Just take it one step at a time and dont rush it , otherwise it will look messy. And it deserves lots of TLC .

[78cb750-2]

1978 CB750 here,

I took off my 4 into 2 stock exhaust and put on a 4 into 1 kerker exhaust. Sounds and runs!  Before the center stand rested on the exhaust pipes but now the center stand is in danger of hitting the chain when its not in use. What modifications should I make so the center stand rests safely?

[NewRider]

Why not take a look at this page...  http://www.cyclexchange.net/Honda%20Cafe%20Page.htm
they do all sorts of specialty parts designed and tested just for our 750s.  There is a 4 to 1 exhaust system about 1/5th of the way down the page.  I've heard lots of good things about this supplier from others in here (so much so that I recently purchased the electronic ignition system that is mentioned right before the exhaust stuff) and at the very least the guy (Ken) is nice and will talk about what you're planning with you to try to figure out what's best.  Check them out!

[Re-run]

Just fab up a little bracket that attaches to the frame to keep the center stand from hitting the chain. I think a simple L bracket should be fine as long as the gauge is sturdy.

[Re-run]

You can check there but that site is mostly for the 69-78 cb750.