aussierider Posted July 31, 2019 Report Share Posted July 31, 2019 Can any one tell me the spark plug hole is on the side I am sure and hole on top for decompression I am I right for monty 348 Quote Link to comment Share on other sites More sharing options...
2stroke4stroke Posted July 31, 2019 Report Share Posted July 31, 2019 No. Plug is central hole. Quote Link to comment Share on other sites More sharing options...
aussierider Posted July 31, 2019 Author Report Share Posted July 31, 2019 So the spark plug goes in top hole not the side does it make and different Quote Link to comment Share on other sites More sharing options...
cleanorbust Posted July 31, 2019 Report Share Posted July 31, 2019 (edited) Yes, spark plug in top hole. This gives an even flame travel across the top of the piston. Edited July 31, 2019 by cleanorbust Quote Link to comment Share on other sites More sharing options...
aussierider Posted July 31, 2019 Author Report Share Posted July 31, 2019 thanks for that cleanorbust bought with spark plug screwed in side hole no wonder its quite right running great So will just change blanking cap plug to the side then same thread Quote Link to comment Share on other sites More sharing options...
chappo Posted August 1, 2019 Report Share Posted August 1, 2019 Just rebuilding one, that’s mine ?? Quote Link to comment Share on other sites More sharing options...
feetupfun Posted August 1, 2019 Report Share Posted August 1, 2019 1 hour ago, chappo said: Just rebuilding one, that’s mine ?? Does it all still fit nicely with the exhaust pipe in place? Quote Link to comment Share on other sites More sharing options...
feetupfun Posted August 1, 2019 Report Share Posted August 1, 2019 I just had a look at mine. If you can remove and refit a spark plug cap on the plug when it is in the central hole with the exhaust in place, I'll be very impressed Quote Link to comment Share on other sites More sharing options...
aussierider Posted August 1, 2019 Author Report Share Posted August 1, 2019 No had to move exhaust over slightly. It’s on but very tight and close to exhaust Also making exhaust too close to tank even know I fitted a aluminium shield to deflect heat off tank looking at re bending exhaust pipe to move away from spark plug cap,and down and out away from heat and plug Quote Link to comment Share on other sites More sharing options...
cleanorbust Posted August 1, 2019 Report Share Posted August 1, 2019 12 hours ago, feetupfun said: I just had a look at mine. If you can remove and refit a spark plug cap on the plug when it is in the central hole with the exhaust in place, I'll be very impressed Strangely I can't recall removing the plug cap or changing plugs presenting any problem with mine, though it was 40 years ago. Quote Link to comment Share on other sites More sharing options...
feetupfun Posted August 1, 2019 Report Share Posted August 1, 2019 Maybe there were more than one 348 exhaust pipe design. With mine it would be extremely hard, maybe impossible to get the cap off if the plug was in the central hole and it was a standard height plug. I see in the brochure photo, the plug is in the central hole but also in the brochure photo showing the left side of the bike, the exhaust looks different to mine where it goes over the head, maybe a smaller diameter pipe. I'll have a better look at mine on the weekend and try and work out if it is different to the pipe in the brochure photo. Quote Link to comment Share on other sites More sharing options...
nh014 Posted August 2, 2019 Report Share Posted August 2, 2019 Restored and worked on numerous 348's and never ran into plug to exhaust pipe interference. They are close, but always had enough room to drop a socket over the plug to remove it. Quote Link to comment Share on other sites More sharing options...
chappo Posted August 2, 2019 Report Share Posted August 2, 2019 (edited) 21 hours ago, feetupfun said: I just had a look at mine. If you can remove and refit a spark plug cap on the plug when it is in the central hole with the exhaust in place, I'll be very impressed Feetupfun , yes I can easily get the plug on and off when the exhaust is in place. Should be back from the welders this week, had the boxes repacked with matting, I’ll put it on and send you an image or two. ?? Edited August 2, 2019 by chappo 1 Quote Link to comment Share on other sites More sharing options...
feetupfun Posted August 3, 2019 Report Share Posted August 3, 2019 (edited) 19 hours ago, chappo said: Feetupfun , yes I can easily get the plug on and off when the exhaust is in place. Should be back from the welders this week, had the boxes repacked with matting, I’ll put it on and send you an image or two. ?? Don't worry chappo I got the 348 out again today and have now fitted the plug to the central spark plug hole and it all fits fine. The other night when I looked at it I didn't twig at the time that you can very easily access the plug with the tank tilted up Edited August 3, 2019 by feetupfun 1 Quote Link to comment Share on other sites More sharing options...
barnesy Posted August 3, 2019 Report Share Posted August 3, 2019 Bit off topic chappo but where are you getting your exhaust repacked? as I need mine doing ( are you getting exhaust and silencer done) is it expensive? cheers Quote Link to comment Share on other sites More sharing options...
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