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Proma Exhaust on Honda Express
- Author: Mike Szytec (---.dsl.dytnoh.ameritech.net)
- Verified User: szytec
- Date Posted: 07-13-09 23:34
http://www.treatland.tv/honda-hobbit-proma-performance-pipe-p/honda-proma-pipe-hobbit-pa50.htm
Has anyone put one of these on a HONDA Nc50? I am trying to figure out what to modify to make the pipe fit. There seems to be three points where clearance is any issue. The rear tire is the first and a little grinding with the dremmel should take care of that. The second is with the pipe and the bottom fins of the cylinder head. Should I trim the fins or modify the pipe for clearance. The third pinch point is the with the cross bar that stretches between the foot pegs. Has anyone modified the frame or should i cut and weld in a channel to all for the clearance. Let me know you guys think? Is cutting into the exhaust a good idea? Will that have a drastic effect on performance?
http://s1008.photobucket.com/albums/af202/szytec/exhaust/
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Re: Proma Exhaust on Honda Express
- Author: chris (---.ptld.qwest.net)
- Verified User: chrisleighty
- Date Posted: 07-14-09 00:24
lose the crossbar/footpegs and bolt on some pedals?
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Re: Proma Exhaust on Honda Express
- Author: ed (---.dsl.applwi.sbcglobal.net)
- Verified User: soapscum57
- Date Posted: 07-23-09 03:24
don’t cut the exhaust!
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Re: Proma Exhaust on Honda Express
- Author: sundown (---.chi.dsl-w.verizon.net)
- Verified User: sundown
- Date Posted: 07-23-09 03:40
make the pipe fit the bike, not the other way around. there are a lot of good pipes to fit that bike . the PPL who made them know way more about it than I could ever do.I have heard that honda’s can rip w/ correct jetting/pipe combo.(i am into vesp’s) the hard work has been done for you. do not chop off cooling fins or any major part of the cases. they are needed for cooling. Ask more here. MA people will help you big-time…..Great People. You came to the right place for ‘Ped help. Peace!,B.
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Proma Exhaust on Honda Express
- Author: Paul (---.gnv.bellsouth.net)
- Verified User: stuartracing
- Date Posted: 09-05-09 21:02
Did ya get it to fit….Any finished pics…..
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Re: Proma Exhaust on Honda Express
- Author: Trent (---.sub-75-219-147.myvzw.com)
- Verified User: schmangy
- Date Posted: 09-05-09 23:16
Do a search on the site to find more info. Type in something like “proma express”.
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Re: Proma Exhaust on Honda Express
- Author: sunset motobrokane (---.twcny.res.rr.com)
- Verified User: motobrokane
- Date Posted: 09-05-09 23:56
can someone PLEASE make a video of one so i can hear what all this “loudness” is about?
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Re: Proma Exhaust on Honda Express
- Author: Tate (---.dhcp.mdsn.wi.charter.com)
- Verified User: madtownmick
- Date Posted: 09-06-09 00:21
Its not going to fit an NC50.
Trust me, I have tried. The closest I ever got was after kitting an express the exhaust port hung down another 1/2’’ or so and the bulb almost cleared the tire in the back. Also the case is kind of in the way and the kick stand would have to go.
Pretty much what you would have to do is lose the center stand and its mounting bracket and cut the header about 3/4’’. I’m sure it would have an effect on performance, what kind I can’t tell you.
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Re: Proma Exhaust on Honda Express
- Author: Paul (---.gnv.bellsouth.net)
- Verified User: stuartracing
- Date Posted: 09-06-09 16:21
- Attachment: 1252268477_scooter_004.jpg
I have one coming for my 82 Urban Express….So it`s not gonna fit my scoot worth a shit huh…..Dammit man…What a waist of $$$$$$$`s….....
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Re: Proma Exhaust on Honda Express
- Author: Tate (---.dhcp.mdsn.wi.charter.com)
- Verified User: madtownmick
- Date Posted: 09-06-09 19:58
No, it will fit an urban express.
The Urban express or NU50 is a totally different animal than the Nc50 or just plain Express.
Well, not totally different, I guess Urban expresses are like chimps, and NC50s are like bonobos, but anyway…
A proma WILL fit an Urban express NU50. You DO have to take off your center stand and your center stand mount.
A proma WILL NOT WILL NOT WILL NOT! Fit an NC50 without cutting and welding.
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Re: Proma Exhaust on Honda Express
- Author: Paul (---.gnv.bellsouth.net)
- Verified User: stuartracing
- Date Posted: 09-08-09 11:09
- Attachment: 1252422590_scooter_002.jpg
Thanks but what good is the scoot without a stand….That would suck….I called up TREATS and cancelled my PROMO pipe order…..I modded my stock pipe and works/sounds pretty damn good…..AND I still have all my parts on my scoot…..
Thanks for the tip though…..
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Re: Proma Exhaust on Honda Express
- Author: chris (---.ptld.qwest.net)
- Verified User: chrisleighty
- Date Posted: 09-08-09 12:14
there are options…
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Re: Proma Exhaust on Honda Express
- Author: Paul (---.gnv.bellsouth.net)
- Verified User: stuartracing
- Date Posted: 09-08-09 13:10
WOW,check that out…..Is it a bolt on stand or welded on…..That looks good….Is that the Promo pipe on yours….
Thanks for the idea…..
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Re: Proma Exhaust on Honda Express
- Author: Paul (---.gnv.bellsouth.net)
- Verified User: stuartracing
- Date Posted: 09-08-09 13:18
Can ya give me a little more info. pic.`s of your exh. / stand deal…..
Thanks brother…...
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Re: Proma Exhaust on Honda Express
- Author: Paul (---.gnv.bellsouth.net)
- Verified User: stuartracing
- Date Posted: 09-08-09 20:51
Thanks Chris….
That explains alot there….I will give it another shot later as I`ve given Benji at TREATS a little run around with cancelling my pipe order…..I`ll get the stand ready so when I DOO get the pipe, I`ll be all ready…..
Thanks much….
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Re: Proma Exhaust on Honda Express
- Author: kevin tortuga (144.90.93.---)
- Verified User: kevcmc
- Date Posted: 09-08-09 20:51
hold on to that pipe, leave it in the package. treats will run out, as they run out of EVERYTHING at one time or another. watch their site. as soon as they run out of this pipe, sell it on MA, and you will get rid of it fast. lotsa hobbit freaks here.
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Re: Proma Exhaust on Honda Express
- Author: Paul (---.gnv.bellsouth.net)
- Verified User: stuartracing
- Date Posted: 10-27-09 18:55
Well I went ahead and ordered one anyways…..What the hell…..Can`t wait to check it out…..
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Re: Proma Exhaust on Honda Express
- Author: Paul (---.gnv.bellsouth.net)
- Verified User: stuartracing
- Date Posted: 11-02-09 19:46
I just ordered the XR kickstand that you are using for youe Express…..Did you use the whole stand bracket to mount it to your express?????Cut some of the bracket off…..
email me if you can please…..
stuartracing@att.net
Thanks…..
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Re: Proma Exhaust on Honda Express
- Author: Paul (---.gnv.bellsouth.net)
- Verified User: stuartracing
- Date Posted: 11-04-09 18:05
- Attachment: 1257375953_scooter_an_must_001.jpg
I`ve been playing with different size/weight rollers in my variator….Finally hit on a combination of 3 5.7 gram rollers and 3 5.6 grams rollers….Killer takeoff then the other weights kick in in the middle and it`s like a 4 barrel carb. opening up…...
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Re: Proma Exhaust on Honda Express
- Author: Rick (---.dsl.irvnca.pacbell.net)
- Verified User: routabit
- Date Posted: 11-04-09 19:53
Hmm…. Couple of things here. The weight in a variator has a cumulative effect, it doesn’t “kick in” the second set of weights.
Even if it did, you must be very sensitive to feel the difference in .3 grams (point 3) of weight.
Lastly, NO Honda express kicks in like a 4-bbl.
But I’m glad you got it tuned to suit your needs. Probably just a typo.
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Re: Proma Exhaust on Honda Express
- Author: Paul (---.gnv.bellsouth.net)
- Verified User: stuartracing
- Date Posted: 11-04-09 21:41
- Attachment: 1257388899_scooter_an_must_009.jpg
I know I over exaggerated it quit a bit….
I can`t see inside the variator to see exactly how they move in there with the different weights next to each other….
But I can feel the variator go through the different stages like it`s shifting gears…..I know a Express hasn`t got the power to KICK IN LIKE A 4 BARREL CARB. ....But compared to a stock one, it has alot more power….
I have matched the combustion chamber to the 70cc piston, no head gasket,proma pipe,open intake w/low restriction airfilter…..To match my HOLLEY 650 DOUBLE PUMPER CARB….LOL..JUST KIDDING DUDE…
It`s a fun little project to play with….I use it at the track as my pit bike to push my bike around after a pass…..
I`ll try to post a pic. of it….
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Re: Proma Exhaust on Honda Express
- Author: Rick (---.dsl.irvnca.pacbell.net)
- Verified User: routabit
- Date Posted: 11-05-09 00:08
Super sweet drag bike dude. I know you were just getting caught up in the mods and the 4bbl analagy was just used to describe the sudden pull.
Seriously though, a finely tuned variated trans is a juggling act. You’re trying to get the variator to hold in long enough to take advantage of the lower gearing range (mid to lighter weight) which is fighting the large torque spring rate in the clutch, and having the clutch shoes hook up smoothly to keep it all within the maximum torque range of the motor in combination with the weight of your ass. This will be different for every combination of bike, motor size & powerband, rider weight and riding condition.
It takes a lot of playing around with the different parts and combos to find the optimum performance. But when it’s done right, the motor jumps directly to the peak power band with what sounds like a constant slipping clutch until it finally hooks up smoothly at about 200’ + out of the hole.
Check out this You Tube video of some variated drag bikes (scooters).
http://www.youtube.com/watch?v=6ttsId9fQ0w
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Re: Proma Exhaust on Honda Express
- Author: Paul (---.gnv.bellsouth.net)
- Verified User: stuartracing
- Date Posted: 11-05-09 08:45
Excellant explanation….I hear ya on that…..I had to do that with a Yamaha Zuma scooter I have….70cc kit and ALL that juggling around of weights, clutch springs, I musta had it apart 50 times…...Finally got it just right and I can keep up with the cars on the road going 55 mph with ease…..
I still have alot more messing around on the Urban to vget it to do like you explained…...It`s about 60% there now….Gotta find some clutch comonents now….
Thanks again for the info…..
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Re: Proma Exhaust on Honda Express
- Author: Rick (---.signatureflight.com)
- Verified User: routabit
- Date Posted: 11-05-09 10:04
Seems that this thread got jaked a bit, but here is a more thorough explanation of the variator/clutch R&D work I did using the Maloosi Delta adjustable clutch on my Extreme Urban.
http://www.mopedarmy.com/wiki/Delta_Clutch
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Re: Proma Exhaust on Honda Express
- Author: Paul (---.gnv.bellsouth.net)
- Verified User: stuartracing
- Date Posted: 11-05-09 15:08
The Mallosssi clutch seems pretty cool…..Good write up on it…..
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Re: Proma Exhaust on Honda Express
- Author: Paul (---.gnv.bellsouth.net)
- Verified User: stuartracing
- Date Posted: 11-05-09 19:39
Who has them…...
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Re: Proma Exhaust on Honda Express
- Author: Paul (---.gnv.bellsouth.net)
- Verified User: stuartracing
- Date Posted: 11-06-09 14:17
- Attachment: 1257535059_scooter_an_must_002.jpg
I just went out and did a topend run….Pegged to needle at 35mph… 70cc kit, Proma pipe, stock carb. high flow filter….I think it should have been around 40 plus mph….What carb. is good for an upgrade, and where is one….
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Re: Proma Exhaust on Honda Express
- Author: chris (---.ptld.qwest.net)
- Verified User: chrisleighty
- Date Posted: 11-06-09 20:00
something is wrong. mine did 35 easy, 40-ish tops all stock except a proma and upjet. you running original drive belt?
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Re: Proma Exhaust on Honda Express
- Author: Paul (---.gnv.bellsouth.net)
- Verified User: stuartracing
- Date Posted: 11-06-09 20:18
Yes original belt…..Maybe I`m lookingt at kilometers…..lol,kidding…..Dammit man, so I should be around 50mph with the kit?????No clutch or spring work….Damn, mine stock with a hogged out stock muffler only would get to 25 at best….Thats crazy shit man…..How did you do dat…..My odometer pegs out at 35 I think…..Maybe cause I`m close to the equator here in Fl…..
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Re: Proma Exhaust on Honda Express
- Author: chris (---.ptld.qwest.net)
- Verified User: chrisleighty
- Date Posted: 11-06-09 22:17
i replaced my belt when my bike was all stock, top went from 26 to 32. OEM belts are about $30, search gen forum for fast urban belts for a few cheaper options.
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Re: Proma Exhaust on Honda Express
- Author: Paul (---.gnv.bellsouth.net)
- Verified User: stuartracing
- Date Posted: 11-07-09 10:34
WOW,. I`ll check that one out….
Thankyou…..
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Re: Proma Exhaust on Honda Express
- Author: Paul (---.gnv.bellsouth.net)
- Verified User: stuartracing
- Date Posted: 11-07-09 15:57
I can`t find anything in the search …...Do you know where?????
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Re: Proma Exhaust on Honda Express
- Author: Paul (---.gnv.bellsouth.net)
- Verified User: stuartracing
- Date Posted: 11-07-09 22:29
WOW, I typed in fast urban belts and it said no results found…..Crazy shit…..
Thanks, I will get one…..Ebay ??????
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Re: Proma Exhaust on Honda Express
- Author: bryan (---.nebula.msoe.edu)
- Verified User: timmb
- Date Posted: 07-29-10 11:55
where/how do the mounting brackets on that pipe mount to the frame?
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Re: Proma Exhaust on Honda Express
- Author: AtLarge (---.client.mchsi.com)
- Verified User: atlarge
- Date Posted: 07-29-10 19:24
They don’t mount to the frame. There is a tab on the bottom of the crankcase and of course the exhaust header bolts. You have to make a hangar to connect it to the fender if you plan to keep it.
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