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Post by markogarelli on Jun 24, 2019 13:44:34 GMT -5
Hello guys, I have a Garelli GSP50 scooter, i want to upgrade it. For an upgrade I was thinking about DR70 evolution, Yasuni R exhaust, Dellorto 19mm carburetor, with Stage6 Racing Air Filter Double-Layer large, Stage 6 Sport Pro variator, Stage 6 drive belt pro, stage 6 clutch springs that engage at 1000 rpm higher, and a Stage6 Crankshaft LPC. This is all for minarelli horizontal. Is there anything I should change, get something better or cheaper. Thanks.
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Post by geoffh on Jun 24, 2019 14:36:36 GMT -5
Hi,welcome to the forum,I don't,t want to rain on your parade :)but that an ambitious plan and could easily lead to a Craig's listing for your scoot.most peeps start out with one upgrade at a time ,bbk and pipe then add to it.I have no doubt they will all fit but getting it running and tuned could be a nightmare spend a little time in the tech section and browse a few builds before you take the plunge keep in touch.
Geoff
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Post by markogarelli on Jun 24, 2019 14:57:50 GMT -5
Hi,welcome to the forum,I don't,t want to rain on your parade :)but that an ambitious plan and could easily lead to a Craig's listing for your scoot.most peeps start out with one upgrade at a time ,bbk and pipe then add to it.I have no doubt they will all fit but getting it running and tuned could be a nightmare spend a little time in the tech section and browse a few builds before you take the plunge keep in touch. Geoff After i made this post, i kept researching, and founf out that stage 6 streetrace is a much better kit, did some further research and founf some similar tuned aerox's. Mine is a similar engine, so im sure it will work without a problem. Thanks for the advice though.
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Post by oldgeek on Jun 24, 2019 19:21:17 GMT -5
Hi,welcome to the forum,I don't,t want to rain on your parade :)but that an ambitious plan and could easily lead to a Craig's listing for your scoot.most peeps start out with one upgrade at a time ,bbk and pipe then add to it.I have no doubt they will all fit but getting it running and tuned could be a nightmare spend a little time in the tech section and browse a few builds before you take the plunge keep in touch. Geoff After i made this post, i kept researching, and founf out that stage 6 streetrace is a much better kit, did some further research and founf some similar tuned aerox's. Mine is a similar engine, so im sure it will work without a problem. Thanks for the advice though. For certain it will work, I think what Geoff was trying to say is that your plan is ambitious to do all at once, depending on your tuning experience. The only thing I would change is to stick with the stock air box. Open filters can be a tuning nightmare, and in your application a stock air box is plenty.
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Post by markogarelli on Jun 25, 2019 4:44:54 GMT -5
After i made this post, i kept researching, and founf out that stage 6 streetrace is a much better kit, did some further research and founf some similar tuned aerox's. Mine is a similar engine, so im sure it will work without a problem. Thanks for the advice though. For certain it will work, I think what Geoff was trying to say is that your plan is ambitious to do all at once, depending on your tuning experience. The only thing I would change is to stick with the stock air box. Open filters can be a tuning nightmare, and in your application a stock air box is plenty. So what you are saying that I should keep the stock airbox, and just put in a better filter sponge. Its not like I dont belive you, I'm just asking, because my friend said that I MUST use a open filter with a 19 mm carb.
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Post by repherence2 on Jun 25, 2019 9:59:55 GMT -5
...or you can do like me and go no filter on a 28mm, like everyone in Hawaii. lol.
just make sure your friend that said, "it's a must to go open filter" , helps you tune that carb.
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Post by 90GTVert on Jun 25, 2019 10:19:15 GMT -5
You usually don't even need to change out the filter element in the stock airbox. Mine is 103cc, 10,000RPM or so, with 21mm DellOrto PHBG and I'm using a stock filter in the stock airbox. I did remove the snorkel tube and open up that hole a little. I don't really know that opening up that hole is necessary though. For you, I'd prob just take out the snorkel and make sure the filter is clean.
What really made me see the light regarding airboxes on 2Ts was when I had a 103cc that would go about 70MPH at 12,000RPM with a 24mm carb. I thought an open filter was a must for that power level. It was a huge pain. Very picky about jetting, needle settings... everything. I'd get it about where I wanted it and the weather would change a little and it would be off again. Out of desperation, I tried a modified stock airbox. It was just as fast and suddenly I wasn't tuning the carb every time the wind changed direction. Haven't looked back since.
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Post by SMALL CC TEK on Jun 25, 2019 14:21:05 GMT -5
I am with the rest here on the air box , If you go open element right out of the box you might be chasing the jetting at the beginning and seize a new motor because your a novice tuner . That was not a insult on your ability as a tuner many of us have been there done that be for and just don't want your hard earned cash wasted in one throttle blip !
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Post by ThaiGyro on Jun 27, 2019 1:02:40 GMT -5
You usually don't even need to change out the filter element in the stock airbox. Mine is 103cc, 10,000RPM or so, with 21mm DellOrto PHBG and I'm using a stock filter in the stock airbox. I did remove the snorkel tube and open up that hole a little. I don't really know that opening up that hole is necessary though. For you, I'd prob just take out the snorkel and make sure the filter is clean. What really made me see the light regarding airboxes on 2Ts was when I had a 103cc that would go about 70MPH at 12,000RPM with a 24mm carb. I thought an open filter was a must for that power level. It was a huge pain. Very picky about jetting, needle settings... everything. I'd get it about where I wanted it and the weather would change a little and it would be off again. Out of desperation, I tried a modified stock airbox. It was just as fast and suddenly I wasn't tuning the carb every time the wind changed direction. Haven't looked back since.
What Vert refers to above...is that most manufacturers will specify an OEM filter that is oversized...In every case I have ever seen. My example: (A 4T example, but...) The air filter for a Honda CRF250L...is the same for a CBR300R and the same for a CB500F twin. There are likely more, from lower displacement. Most single and twin Honda's use these. It is not a low performance/high performance issue...it is simply adequate filtering to allow useful air flow. The box design can help that way more than the filter size.
That said...the first downside to any air filter, is the "back flash" screen. On any bike, it is quite nonsense...Yes the EU/US/AU whoever...make laws to prevent OMG from happening. I cut mine off! I have always cut mine off. We ran some generic dyno runs on an out of tune Kawasaki 300...with/without the screen. HP +.8 to 1.0 increase. It simply IS the restriction that many think is an inlet problem.
On my 250 Honda, it was similar...but far better throttle response, for sure. More air/fuel flow. My next test will be the insertion of a round, multi-stage filter of even larger surface area. The MX world does not use flat...must be a reason. Top end and quick throttle response come to mind.
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