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| 4 Stroke Bicycle Engines & Kits 4 stroke motorized bicycle engine kits are great if you want reliability or do not want to mix your oil and gas. Learn from each other how to get the most out of your 4 stroke bicycle engine |
Reducing exhaust noise
Discussion at Motorized Bicycle Engine Kit Forum in the 4 Stroke Bicycle Engines & Kits forum. Is there any way of reducing the exhaust noise of a new Robin 35? It's acceptable, but I don'...  | | 
09-22-2009, 01:24 PM
| | Motorized Bicycle Newbie | | Join Date: Aug 2009 Location: israel
Posts: 11
| |  Reducing exhaust noise
Is there any way of reducing the exhaust noise of a new Robin 35? It's acceptable, but I don't want to attract attention. |
10-13-2009, 07:49 PM
| | Motorized Bicycle Senior Member | | Join Date: Jul 2009 Location: Ogden, Utah
Posts: 83
| | Re: Reducing exhaust noise
If you ever find a way I'd like to know too. I'm going to go deaf from this engine. I don't know how anybody could call this quiet but everyone does. I was expecting it to ba A LOT quieter. |
10-13-2009, 08:26 PM
| | Motorized Bicycle Newbie | | Join Date: Sep 2009 Location: Maine
Posts: 19
| | Re: Reducing exhaust noise
This thread might help you out: muffler/noise
Also, from what I hear (not personal experience) intake noise is a big problem too. This might help out with that: Remote Airbox (& intake silencing) on the cheap
Hey hey, I think this is the first time I think I've been able to give advice on the site! Woohoo! |
10-15-2009, 08:51 PM
|  | Motorized Bicycle Elite Member | | Join Date: Sep 2008 Location: Seattle
Posts: 442
| |  Re: Reducing exhaust noise
Quote:
Originally Posted by rdrunner2010  Hey hey, I think this is the first time I think I've been able to give advice on the site! Woohoo! | Nice RoadRunner! |
10-16-2009, 01:59 PM
| | Motorized Bicycle Senior Member | | Join Date: Jul 2009 Location: Ogden, Utah
Posts: 83
| | Re: Reducing exhaust noise
Unfortunately all 2-stroke info. The Subaru is a 4-stroke. |
10-16-2009, 08:56 PM
| | Motorized Bicycle Elite Member | | Join Date: May 2009 Location: colorado
Posts: 488
| | Re: Reducing exhaust noise
Buddy where did you buy a robin-subaru 35cc 4 stroke at? |
10-16-2009, 09:42 PM
| | Motorized Bicycle Senior Member | | Join Date: Jul 2009 Location: Ogden, Utah
Posts: 83
| | Re: Reducing exhaust noise
Staton, it came with a kit. I asked Dave about a quieter muffler, he didn't know of one. |
10-17-2009, 05:21 AM
|  | Moderator | | Join Date: Jul 2009 Location: Maine
Posts: 1,197
| | Re: Reducing exhaust noise
Do you have pics of yer setup? is it mid or rack mounted? There's a plethora of muffler cans available for the lil 4 strokes at most big hardware stores and/or repair shops, while the mount may need to be modified there's potential there.
One of the things that helps with noise is simply exhaust system length, if yer mid-mounted making a header pipe has potential... |
10-17-2009, 07:49 AM
|  | Motorized Bicycle Elite Member | | Join Date: Dec 2008 Location: west-central Illinois
Posts: 188
| | Re: Reducing exhaust noise
I use my Robin Subaru 35cc mainly for down town use. I ended
up adjusting the idle as low as it would go without dieing. I only go
10mph to 15 mph and it is really a quiet engine at the low speeds. |
10-17-2009, 09:35 AM
| | Motorized Bicycle Newbie | | Join Date: Sep 2009 Location: St. louis, mo
Posts: 6
| | Re: Reducing exhaust noise
Quote:
Originally Posted by bandito Buddy where did you buy a robin-subaru 35cc 4 stroke at? | On the other site. "Silvaire" is selling the Robin Subaru engines without a gas tank for $145.
Mike
Last edited by Norman : 10-21-2009 at 11:42 AM.
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