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Post by harronek on Sept 25, 2017 1:25:05 GMT -5
I own a few Aerox's and Im currently building up a project bike . some of the parts that I was originally going to use on my project bike have been superseded with bigger and better stuff . I have a standard Aerox that has had no modifications , and I am contemplating putting this Arrow pipe on it that I was going to use on my project build , but is now not required for that build .  My question is . With the standard motor/cylinder and this pipe , is there any performance advantage to getting a bigger Carb , or is re-jetting the factory Carb my best option ? Is there nothing to be gained by increasing the Carb size with the standard motor ? Im interested in seeing what performance improvements I can get out of a standard motor with nothing more than Pipe and Carb changes . Ken |
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Post by 190mech on Sept 25, 2017 2:29:58 GMT -5
From the looks of the pipe,I'd say its built for a mild tuned engine due to its narrow angles and small belly diameter,to get more from a stock motor you will need to at least measure the cylinder porting and check the head design and squish.Then adjust as needed..Its doubtful a bigger carb will help a stock setup..
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Post by ThaiGyro on Sept 25, 2017 3:52:22 GMT -5
I'm with 190mech...you can make this pipe work with a stock carb. Cannot recall my friends tuning setup, but I think he just up sized the pilot and main. Maybe only the main jet. The pipe is a nice looking design, but not much in the performance department.
If you want good sound, good looks and still super economy...try it! If you are looking for better power, you might sell the Arrow and get or build a better design. Maybe you can make out with little cash. Stainless can be cleaned up easy!
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Post by geoffh on Sept 25, 2017 15:42:50 GMT -5
Ken,I,m sure I,ve read(within this forum) that the standard carb is more than capable with a little jetting work.My tuppenth to your project is to change the clutch springs,cheapest best upgrade to my commuter build.
geoff
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Post by harronek on Sept 25, 2017 16:40:40 GMT -5
Thanks for the replies .
I think I will try this pipe on my standard motor and I'll report back with how it goes .
Can I ask another question of the knowledgable members .
Here in Australia I have access to what we call E85 fuel ( a type of race fuel , Ethanol /petrol blend ) .
In the research I have done it mentions that the fuel systems of any vehicle using E85 has to be compatible for E85 otherwise damage to non- compatable fuel system components may occur .
What does that mean and what components in the fuel system may not be compatible ?
Ken
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Post by 190mech on Sept 25, 2017 19:07:43 GMT -5
85% Ethanol=high octane,but high corrosion as alcohol is hygroscopic(attracts water) making it eat aluminum,steel,rubber and gaskets..2 stroke crankshaft roller bearings will quickly rust causing crankshaft failure..Other than that its great!!  |
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Post by harronek on Sept 25, 2017 20:14:30 GMT -5
Sounds like I won't be using it  Ken |
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Post by aeroxbud on Sept 28, 2017 4:06:06 GMT -5
When you say standard carb, which one is it? The early Aerox had the 17.5mm carb. The later ones had a Gurtner 14mm carb.
If it's the 14mm carb Yamaha used as a money saving exercise. You would see a gain with the 17mm carb.
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Post by bendover on Oct 13, 2017 15:09:27 GMT -5
When you say standard carb, which one is it? The early Aerox had the 17.5mm carb. The later ones had a Gurtner 14mm carb. If it's the 14mm carb Yamaha used as a money saving exercise. You would see a gain with the 17mm carb. Seem to be differences in different markets. Here (europe/sweden) Aerox is known to have a 12mm dellorto stock. Talking about the old model, not the facelift/new naked model which exist as 2t or 4t which I have no exp with. Normally people get 17.5mm, some get 19mm but there isn't any performance benefit from 17.5 to 19 on normal 70cc + full expansion chamber exhaust setups, except significantly worse fuel economy. Source: www.pedparts.co.uk/blog/yamaha-aerox-carb-comparison(note: text in article also state 12mm for Aerox)  |
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Post by aeroxbud on Oct 14, 2017 1:10:48 GMT -5
When you say standard carb, which one is it? The early Aerox had the 17.5mm carb. The later ones had a Gurtner 14mm carb. If it's the 14mm carb Yamaha used as a money saving exercise. You would see a gain with the 17mm carb. Seem to be differences in different markets. Here (europe/sweden) Aerox is known to have a 12mm dellorto stock. Talking about the old model, not the facelift/new naked model which exist as 2t or 4t which I have no exp with. Normally people get 17.5mm, some get 19mm but there isn't any performance benefit from 17.5 to 19 on normal 70cc + full expansion chamber exhaust setups, except significantly worse fuel economy. Source: www.pedparts.co.uk/blog/yamaha-aerox-carb-comparison(note: text in article also state 12mm for Aerox) My 08 model had the 12mm Gurtner carb. The early ones not the new face lift version, till the late 90's had a 17.5 carb.I Like you said it probably varied between markets. |
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