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  1. Repair a Leaky Gas Tank by Soldering

    Pictures and Videos
    How to fix a leaky gas tank by soldering it. Fixes, pinholes, small cracks, and seams without painting. Easy Step by step. you can do this, because a leaky gas tank sucks, stinks, is dangerous. Remember " Vintage motorcyclist is a person willing to take a container of highly flammable liquid...
  2. Oil Troubles

    Engine Discussion
    Hi there, It has been ages since I posted here, but I'm pretty stumped on something. I have oil leaks from the oil cover (major ones), crankcase cover, kickstart lever, and the cam box. I pulled the old rubber gasket from the oil cover* and replaced it with a fiber one I bought online. I was...
  3. Low compression diagnosis, next step if rings seem okay?

    Engine Discussion
    Hi. New poster. Just going through a 71 CB350-K3 making it roadworthy again. Fairly new at this but I have basic wrenching skills. Right now I'm chasing low compression in the left cylinder; the right hits 135 psi stone cold easily on the kickstarter -- and the bike ran on that cylinder when I...
  4. Leaking like a BEEEEEEEEEEP!!!!!

    Engine Discussion
    Looking for advise, sympathy, ridicule what ever you got really. Here's the deal. I'm using copper head and base gaskets that were treated with Permatex Copper Gasket Spray stuff on my CL350. I went with copper gaskets because of machining and wanting to have proper timing without having to...
  5. 1980 CM400E new owner questions

    Miscellaneous Discussion
    Hello everyone, I am a new owner of 1980 CM400E. I have pick it up just yesterday and since then I have been finding a few things about the motorcycle. First, I think the gaskets are old and leaky as shown here. I will address this by doing gasket job later this summer. But what gaskets do...
  6. 1978 CM185t wont start, ran high.

    Fuel Supply and Carburation
    I bought a running 1978 CM185t, it idled at the redline and ran rich and no amount of carb adjustment would fix it so i removed and cleaned the carburetor. After that I could not get the bike to star at all, it would sound hopeful at first and then the cylinders would flood badly. The carb also...
  7. Prepping tank to weld pinhole(or another method?)?

    Fuel Supply and Carburation
    I was doing a rust removing treatment which created a pinhole on the bottom right of my tank. I have J&B weld to patch up the hole but i know its not smart to have any trace of gas in the tank before heating it or dealing with an open flame. I read in another forum that rinsing with hot water...
  8. CB360 leaking oil from mutliple places

    Engine Discussion
    Hello! I'm new to the Twin forums, but I'm very happy to be a part of the community. let me start by saying that i purchased a CB360 two weeks ago by a guy in louisville kentucky. I reside in Lexington kentucky now, and am a university of kentucky student. When purchasing the bike, it had no...
  9. Hole in cylinder fin CB350

    Engine Discussion
    I recently purchased this 71 CB350. It appears to have an oil leak somewhere...While trying to figure out where it was coming from I found what looks like a hole in the fin under the spark plug. I assumed the oil was coming from one of the gaskets but I'm not sure if it is also coming from the...
  10. carb exhaust hose leaking gas

    Fuel Supply and Carburation
    i just took apart the engine of my cb450 twin over head cam. putting it back together and trying to start it resulted in the exhaust hoses from the carbs to leak gas. everytime i turn my gas on it leaks gas. any thoughts?
  11. Carburation troubles

    Fuel Supply and Carburation
    I recently bought a 1973cb 350ss, the bike is in good shape with only 21000 miles. However I am having a little bit of trouble when I start to ride the bike. It will start up good usaully first kick, and it will idle around 1300 rpms, if I rev it at all past 3000rpms it will not come back down...
  12. 1981 CM400c is leaking on my floor

    Fuel Supply and Carburation
    I have searched and read a few threads though I have only owned the bike 19hrs. 1981 CM400c was running when I went to pick it up. Has been sitting for a few years. Drove around the driveway and loaded it up. When I came home I put 'some' Lucas additive and a fresh can of unleaded in and the...
  13. CB350 Oil Inspection Bolt Hole Stripped

    Engine Discussion
    Alright, so I took my bike down the road a few times to test it. When I was pulling back into the garage, I killed it. When I looked down, my foot and the whole left side of the engine was covered in oil. After further inspection, the oil inspection bolt was missing. I went and bought a new...
  14. HONDA CB200 rear tire size/selection?

    Tires, Wheels, and Brakes
    Hello all! I hope everyone is enjoying this nice weather we are having. Unfortunately my rear tire is experiencing a leak around the rim where the rubber hits the metal (no specific spot). Does this mean I need a new tire? My wife says I should get new tires no matter what, and she is probably...
  15. Countershaft oil seal keeps coming loose

    Engine Discussion
    Hey guys, i developed an oil leak from the sprocket side a little while ago. Found out that the countershaft oil seal had come loose and was more than halfway out of its seat. I cleaned the surfaces thouroughly and put the seal back in with a matching pvc pipe. The oil leak stopped for a few...
  16. Oil leak? Can't figure out why...

    Engine Discussion
    Hey guys, I've had a small oil leak out of the front right corner of the clutch side cover. It was pretty consistent (about one drip every minute, and dripped more when engine was running), so I opened up the cover this morning to see if the gasket was torn or if there was a nick in the case...
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