'85 Honda 250SX VS. '85 Honda 250ES OEM Mufflers... Interchangable ??

[Maico]

Does anyone know if the OEM muffler from a '85 Honda 250SX is the same or interchanges with the OEM muffler from the '85 Honda 250ES ?? I know they look awfully close to one another. Part numbers are off by 1 letter and 1 single digit.

'85 250SX #18310-HA6-681
'85 250ES #18310-HA0-682

[Queef Chief]

I know this doesn't answer your question, but I put an '85 SX head pipe on an 85 ES and it fit perfectly. I would bet the muffler would fit as well.


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[Maico]

I'm thinking the same thing. If the exit angle of the headpipes match...I'd be willing to bet the mufflers will swap too. The reason for this question is that my OEM SX muffler has been repaired in the past from previous owners and needs repairing again. There's a few aftermarket silencers out there but they only list them for the ES.

[dustrunner]

I believe the sx has a shorter frame just from memory... so I woud guess its different....

[captainweezy]

Very good question. I don't have an answer either but I can speak on the aftermarket mufflers. I installed on on my big red right before trikefest and it fits great. Decibels are near stock.

[redsox]

more of an I don't know than an answer, but i think the lower mount is in a different place. The reason i think this is that i changed out a big red to a chimp aftermarket exhaust and it only used the upper and rear mount. It was so nice that i did the same for a friends sx. same exact kimpex muffler. same top mount and rear mount. bottom mount did not exist. 2 outta 3 aint bad.

[atc007]

They are different, no go without a welder.

[Maico]

They are different, no go without a welder.

A mod to the inlet pipe is probably in order. That...I can handle. I'll pick one up and see how it goes.

Thanks for all the info guys. :)

[atc007]

Post back what you find. My old brain can't remember the exact differences,or which one I was swapping. SX to ES or vice versa. Just know they didn't work without work.

[axeman24]

I don't mean to hijack a thread
if so call me out
same topic different part
I have a 250sx and located a 250es big red parts bike
will the airbox from the es fit the sx

[mollie8000]

no on the airbox, muffler works with some modding

[axeman24]

no on the airbox, muffler works with some modding

thank you!

[dougspcs]

Post back what you find. My old brain can't remember the exact differences,or which one I was swapping. SX to ES or vice versa. Just know they didn't work without work.

My old brain does!! Hey Bill, it's been a while!!

Yes it will interchange..However the one machine has a flange on the frame to connect and support the pipe, the other doesn't. That bit my old brain doesn't remember..Same condition as Bill.

Anyway you install the muffler and if needed cut the flange using a grinder to make sure it clear and doesn't contact the frame. The back securing bolt and front pipe geometry are the same on both models and it'll directly fit once this small modification is done!

[ironchop]

My old brain does!! Hey Bill, it's been a while!!

Yes it will interchange..However the one machine has a flange on the frame to connect and support the pipe, the other doesn't. That bit my old brain doesn't remember..Same condition as Bill.

Anyway you install the muffler and if needed cut the flange using a grinder to make sure it clear and doesn't contact the frame. The back securing bolt and front pipe geometry are the same on both models and it'll directly fit once this small modification is done!
Good to see you pop in here after so long, Doug

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[Scootertrash]

Yea, no kidding!! Glad to see you stop in Doug!

[atc007]

Doug in the house !!!!!! Miss talking with you bud. Hope all is well.

[Maico]

UPDATE!!

After watching a short clip on FB of a rider with the same idea...it looks as though the frame mount for the inlet pipe interferes with the swap. The rider in the vid cuts the frame mount tab off the frame and then it bolts up just fine. If my SX were a total beater...I would probably do the same but I'd like to keep all frame tabs intact. I think with the cutting and swapping of the original inlet pipe with the aftermarket ES muffler...I can have the best of both worlds.

So...... this concludes...an ES aftermarket muffler to SX swap is NOT a direct bolt on. Either cut the tab off the frame or cut and swap the inlet pipes.