lagrasta50cc
Scoot Member
Posts: 31
Location: Mission Viejo, CA
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Post by lagrasta50cc on Nov 23, 2020 11:20:05 GMT -5
I removed the Variator spacer, goes 40mph+. Should I also remove the Exhaust restrictor; anything more to gain?
2002 2T Yamaha Vino 50cc
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Post by aeroxbud on Nov 23, 2020 12:29:55 GMT -5
Has it still got the original pipe? Can't be many that have being 18 years old.
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Post by Steve B on Nov 23, 2020 13:25:19 GMT -5
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Post by Zino on Nov 23, 2020 17:23:38 GMT -5
If you have the stock exhaust yes remove the restrictor you will have more power top to bottom .
Better yet upgrade the exhaust and get more top speed and power .
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lagrasta50cc
Scoot Member
Posts: 31
Location: Mission Viejo, CA
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Post by lagrasta50cc on Nov 30, 2020 12:32:36 GMT -5
It does 40+ now. If I remove the exhaust restrictor, it gains acceleration throughout and maybe a little on top? New exhaust gains what more?
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lagrasta50cc
Scoot Member
Posts: 31
Location: Mission Viejo, CA
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Post by lagrasta50cc on Nov 30, 2020 12:35:12 GMT -5
Thanks for posting, appreciate the link. I'm subscribed to his channel, good stuff. I however already removed the spacer, and he mentions nothing of removing the exhaust restrictor. |
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Post by geoffh on Nov 30, 2020 15:56:43 GMT -5
Post a picture of your exhaust flange/ end of pipe ,the restrictor may have been removed already.
Geoff
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Post by Zino on Nov 30, 2020 18:55:36 GMT -5
It does 40+ now. If I remove the exhaust restrictor, it gains acceleration throughout and maybe a little on top? New exhaust gains what more? 3-5 mph on the top end . Depending on pipe since you will rev out farther with power . You may need to go lighter on the weights a half gram or so less works well with the street style pipes you may need even lighter weight if you go with a expansion pipes . popping wheelies on low end if you want . Just need to reset the trans for the change in where the power band starts Medium strength springs work pretty well with most pipes |
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lagrasta50cc
Scoot Member
Posts: 31
Location: Mission Viejo, CA
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Post by lagrasta50cc on Jan 11, 2021 12:13:20 GMT -5
if the exhaust restrictor is removed (stock pipe), must I also rejet? I'm hoping not. Although, I'm concerned with running lean, starving for oil, etc due to this exhaust mod. I admit, I may be worrying about something that will not occur. I'm looking for someone that can advise for certain before I pull out the Dermal.
Thank you!
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Post by Zino on Jan 11, 2021 19:21:50 GMT -5
If you never run wide open then No Upjetting falls in the better safe than sorry category and jets are cheaper than a engine If you run wide open for miles then You will need a larger main jet . I did up jet with removing the restrictor from stock scooter . I used and still do use a Mikuni size 70-72 77 was a notch too rich and would foul plugs They worked well when I upgraded to next level street pipe I bought mine from jetsrus mikun vw 11-22 style They also are available on Amazon from Glixal www.amazon.com/Glixal-1PE40QMB-Scooter-Carburetor-Mikuni/dp/B06XHY4Y9H/ref=sr_1_1?dchild=1&keywords=mikuni+jets+glixal&qid=1610411218&sr=8-1The extra rpms and extra flow from the pipe need a notch more fuel Very important to check for a good seal after reinstalling the exhaust . With the scooter running take a gloved hand and wet rag and plug the exhaust if it kills quick your good . If it keeps running you are not sealed up |
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lagrasta50cc
Scoot Member
Posts: 31
Location: Mission Viejo, CA
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Post by lagrasta50cc on Feb 8, 2021 11:20:34 GMT -5
Thanks Zino
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