SOHC.co.uk Forums > CB350/400

400 Four strip down.

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GregShiv:
Hi,

I am in the process of stripping down my newly bought eBay 400 Four.

It is now in bits and I will soon be getting the frame, swing arm and various bracketry blasted and powder coated.

One exhaust stud is refusing to come out and one of the fork "pipe compression seat" bolts is refusing to budge even with a cordless impact driver.

The engine is a runner after I got power to the coils but will be getting a strip down and examination in due course.

Loom had been hacked, every connector had been cut off and the looms soldered and wrapped in insulation tape. So new loom ordered along with a lot of other missing or damaged parts.

The question I have is that there is a rust hole on the back of the frame and I would like to know what would be the best thing to get done to it i.e. welding?

Any advice greatly appreciated.

Picture attached.

hairygit:
Enlarging the picture of the hole in the frame, it looks like it is cracked around the top part as well. May just be a scratch in the grime, but it certainly warrants close inspection when cleaned up, as any cracking in that area is serious, it's what takes the load/shock from the rear suspension unit, any weakness here can spell disaster if not dealt with properly.

GregShiv:
Yes I noticed that as well, I will be giving it a cleanup and have a proper look.

Thanks.

Trigger:
Take it too the blasters (beware some blasters are animals and over do it, leaving the frame looking like a tea bag) once cleaned then you can truly assess the frame. Also have all black painted metal parts blasted.
1, FRAME
2, SWINGING ARM
3, TOP & BOTTOM YOKE
4, FOOT PEGS
5, REAR LIGHT BRACKET
6, BATTERY BOX
7, ELECTRICS PLATE
8, CLOCK BRACKET
9, TORSTION BAR
10, SEAT PAN
11, ENGINE MOUNTING PLATES
12, And anything else in hard metal you want painted.

Integra99:
 Good luck with the rebuild, I'm slowly rebuilding my CB400/4 had the same issues, in the end.. the exhaust stud came out with penetrating oil and lots of heat and very very small movements... it often helps trying to tighten the bolt as well.

I had the same hole in the frame, had it welded and the frame sprayed rather than powder coated.





My new ss studs.... :)

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