Last week was the first time I took the Scott out on the road after a long rebuild (three years) I was a dream to ride ( the first time I had been on a Scott) well worth the all the time. everything worked fine except for a couple of small items. On returning back at base I noticed one of the plugs had a small amount of oil around it. I removed the plug, thread looked OK screwed the plug in finger tight then applied the spanner, this is where things went wrong. It just keep turning, stripped thread. No panic I had long since given up deadlines, so I drained the systen down, removed the radiator (thanks John no leaks) released the head bolts but head would not lift past the frame. Again no problem doubled nuts on the studs and unscrewed all the studs (well greased & new they came out easly) removed the head all I need now is to get the thread heli-coiled 18mm x 1.5 pitch.
The good news was just over a year ago I purchased a secondhand head from Gill (god bless the spares scheme) at the annual rally. Imagine my surprise when before griving the new head a good clean up I thought I should offer it up to the bike to check it fits (cause it will they are all the same) OH NO THEY ARE NOT. this one had smaller compression domes in the head about 68 mm diameter not 74mm as my head has, when the bike was turned over the piston lifted the head. Is this off a smaller CC short stroke? Well I was not going to be beaten so I re-machined the chambers to the same profile as the old one, wall thickness to water ways ended up the same as the original so I can only assume the same casting is used (apart from minor differences). Now all I have to do is make or buy new tubes as the old ones were craked or damaged. Does any one have 1″ x 26 tpi tap or die that they could loan me? The Die is not too important as I can screw cut the tube but I do need a tap to clean out the head threads. Can anyone tell me what is used to seal the threads of the tubes if anything. Any tips or tricks greatly appreciated.
regards keith
.
