Advice Please - Changing from 2 into 2 to 2 into 1

[450L]

Hi

Hope someone can help.

I'm running an '82 GS450L and am looking to replace the old original twin exhaust system to a new Motad 2 into 1 system.

Will I have to adjust the carbs, if so what will I need to do?

TIA

[UncleMike]

From what I've read on here, if that's all you're changing you shouldn't need to change anything.

You should also get a slight power increase, a bigger noise increase, a nice weight reduction and a huge appearance improvement.

[duaneage]

I would contact Motad and ask them if the pipe needs to be jetted. Stay away from pods and you should be OK.

[hkabik]

I am about to do the same on an '81 GS450S only using the MAC 2 into1 system. Everything I have heard thus far just says install the exhaust and go, is there anything I should look out for that may be telling me the carbs need jetting post application?

[duaneage]

Cut the engine at highway speed and see if the plugs are white. bring the jets up a size and raise the needles a notch if they are white, if they are tan leave them alone.

[450L]

Thanks for the quick replies, useful knowledge

I have also heard direct from Motad, they claim no rejetting required, but I like the 'look at the plugs' suggestion, I think I'll do that check just to make sure.


Cheers :P