Post by jr1 on Jul 13, 2022 21:57:11 GMT
Hi all
so my 2,750m 250 delux runs excellent takes a bit of starting from cold but that’s all, it also smells and sounds right and when I measure the temps on the headers it’s 76deg on both sides.
now my 400nb starts really easily hot or cold, idles well and rides fairly well. I have stripped the carbs and gone through the bike as it’s only done 1650m from new, so it’s stood most of its life.
I went to work on it yesterday and it just isn’t quite as crisp as I think it should be and it doesn’t sound or smell like my 250.
mixture is set standard at 1.5 turns
new plugs fitted and carbs cleaned and balanced. New o rings fitted on the inlet rubbers and new copper seal in the exhaust headers.
i noticed yesterday that it appears to be running a little hot and there is the start of some yellow discolouration on the right hand header following a recent re chrome nothing on the left header.
I checked the header temps the right was 96deg and the left 86deg. When compared to the 250 having completed the same journey the temps were 76deg, so the 400 is running much higher.
both bikes are absolutely standard specification.
hope the above makes sense.
any Ideas appreciated.
so my 2,750m 250 delux runs excellent takes a bit of starting from cold but that’s all, it also smells and sounds right and when I measure the temps on the headers it’s 76deg on both sides.
now my 400nb starts really easily hot or cold, idles well and rides fairly well. I have stripped the carbs and gone through the bike as it’s only done 1650m from new, so it’s stood most of its life.
I went to work on it yesterday and it just isn’t quite as crisp as I think it should be and it doesn’t sound or smell like my 250.
mixture is set standard at 1.5 turns
new plugs fitted and carbs cleaned and balanced. New o rings fitted on the inlet rubbers and new copper seal in the exhaust headers.
i noticed yesterday that it appears to be running a little hot and there is the start of some yellow discolouration on the right hand header following a recent re chrome nothing on the left header.
I checked the header temps the right was 96deg and the left 86deg. When compared to the 250 having completed the same journey the temps were 76deg, so the 400 is running much higher.
both bikes are absolutely standard specification.
hope the above makes sense.
any Ideas appreciated.
