SOHC.co.uk Forums > CB750
Spark plug problems
Mag1:
You can get spark plug inserts and die, whereby you recut the thread and screw in the oversize insert. Same as helicoil. It's strongly advised you have someone who knows what they are doing to do this and hover out all swaft. It's only a temporary fix until you remove and have professionally fixed. You can get them on eBay.
Bryanj:
Its a risk but you can helicoil using a well greased slow drill and well greased tap to collect swarf then leave the plug out and start engine to blow out any residual. Way back when we would offer the customer the option as if it didn't work OK the engine still had to come out. Over 60% time worked OK
chrisf1:
--- Quote from: hairygit on May 20, 2017, 01:59:21 PM ---Looks like someone has already hacked away the crossbars either side of the main tube! :o
--- End quote ---
Hi again if mine are not there I have no idea what they are like or do could you describe position and function or even better a pic many thanks Chris
hairygit:
Under the fuel tank you have the main spine of the frame. There should also be 2 tubes, one either side of the spine to brace the headstock. Some people cut these out and fit removable tubes, such as the Gordons frame kit, which allows the cylinder head to be removed without taking the engine out of the frame. Personally I would not ride a bike with such a modification, Honda did not put them there just to annoy owners with blown head gaskets, they are there to stop excessive flexing at the headstock, which can cause stresses on the metal and the welds, and dodgy handling. Yours unfortunately looks like someone has completely removed those tubes so they get the look they want under the tank, and I dread to think what any prospective insurer would think about that, I wouldn't attempt to ride it if that is the case! :o :o :o
Mag1:
Take some pics of the bike with tank removed and any other problem areas, them post them on here that way you can get more precise answers, And solutions to fix them. Did the engine run before you got it? Or seller said it did?. What about electrics and all that, have you hooked up a battery to see what is working and what needs to be changed from us spec to uk.
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