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Author Topic: 125 exhaust on a 250 evolution  (Read 1242 times)
grpics
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« on: January 06, 2018, 17:12:36 »

I was in my local bike breakers this morning, and noticed an X9 125 in awful condition about to be broken.
However, it had an aftermarket stainless exhaust fitted which made me wonder if it would replace the rather rusty original exhaust on my 250. The engine looked identical to the 250's but would it fit, and would it be big enough to flow the extra exhaust gases put out by the bigger engine?
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« Reply #1 on: January 06, 2018, 19:28:15 »

Only one way to find out!

Bob
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« Reply #2 on: January 07, 2018, 20:08:42 »

+1
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Gav
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« Reply #3 on: January 07, 2018, 21:32:30 »

Wasnt the 125 the Leader engine and the 250 a Honda but that said the exhausts on the 125 Aprilia Atlantic look the same as the 4/500 Sprints, which correct me if wrong was EVO based and the 125/200 Leader also, however I think it can be a risky issue, as for instance the Shotgun exhausts on my Mille need a power commander box or as some, far cleverer than I, can remap the ECU using a laptop to make em run smoothly without.
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grpics
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« Reply #4 on: January 07, 2018, 22:23:45 »

Thanks for the replies. I think I'll call in during the week and see how much they want for it.
I'm sure I can make it fit! 
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Dave Milnes
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« Reply #5 on: January 08, 2018, 08:52:15 »

It shouldn't be that far out the silencer should be fine, the input pipe may need slight mods. The definitive test is if it physically fits and the engine runs, just see if top speed is reduced indicating a flow restriction.
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« Reply #6 on: January 08, 2018, 10:21:41 »

Gav, the early 250's had the Honda engine but the Evo had the Quasar engine which was basically a beefed up Leader engine as used in the 125s.
I would imagine the exhaust should be able to be made to fit but, depending on which maker it was from, I would be amazed if it actually silenced much. Many of the aftermarket 125 exhausts struggled to dampen the sound much from a 125 so with a 250 it could be really loud. Some wadding may be able to help with this but would also restrict flow.

Bob
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X9 125cc 51 Reg in red (now sold)
X9 250sl 03 Reg (Given away, it left me in the back of a Micra!!!)
X9 500sl 03 Reg, now in Black
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« Reply #7 on: January 08, 2018, 20:25:39 »

Ok thanks Bob maybe I should have gone to a certain well advertised optician, as I see now the heading clearly states states 125 exhaust on a 250 evolution, but maybe not clear enough for some/ one-yours truly for instance.
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