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Yamaha 50 Salient performance

 
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Saiga12
Junior Wrench


Joined: 17 Jul 2010
Posts: 3
Location: Taupo NewZealand

PostPosted: Sun Aug 08, 2010 11:20 am    Post subject: Yamaha 50 Salient performance Reply with quote

I have a yamaha 50 Salient & are trying to make it go quicker - so far i have installed an irridium plug, performance coil & lead, unlimited CDI, high speed variator kit with 5g rollers,stronger clutch springs, pod filter, small expansion chamber exhaust,disabled the oil injection to run premix & it doesnt seem to go that much quicker - the revs are of course quite a bit higher now but the top speed doesnt seem to have increased that much if any with me on it ! im 108kg my 12yr old did get it up to the max on the speedo which is 60kph.
if the belt is worn even a little does it make that much difference ?
Any suggestions would be looked into - still have not got the slightly larger tyres yet but will have them soon .
Thanks !
All this is in preparation for a 2Hr 50cc scooter off road race ! some of the newer types eg Adly & PGO 50 seem to have much more grunt with no modifications - is mine just too old ?
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DandyDan
Site Admin


Joined: 17 Oct 2007
Posts: 1076
Location: Victoria, BC

PostPosted: Mon Aug 09, 2010 8:01 pm    Post subject: Reply with quote

In addition to what I wrote to you via email, I would add that no, it's not 'just too old'. The trick is figuring out where the bottleneck/underperforming areas are and addressing the right things. For example, an expansion chamber exhaust can be a great mod but it can also do nothing if the revs aren't matching well with the exhaust. Sometimes you can do a bunch of great things will little improvement, and then you finally address that remaining bottleneck and the scooter leaps to a higher level of performance.

I've never worked on a Salient so I'm just guessing, but I suspect that the stock carb is a fairly major bottleneck and changing that to a larger carb may really open things up. I think the stock carb is a 12mm which is miniscule and it severly limits the air flow. Something in the 18-20mm range would likely offer a sweet performance increase and it may really open up the top end. You would need to find a way to mount it though and rejetting can be a bit tedious.

Where did you get the variator? Got a link? Others may be interested.
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sc00ter
Master Wrench


Joined: 23 May 2010
Posts: 43
Location: norfolk, VA

PostPosted: Tue Aug 10, 2010 6:35 am    Post subject: Reply with quote

I too think that a carb change should help. Also, is the expansion chamber for take-off or top end? There is a difference. Finally, too light of rollers will not hit the top speed, hence the reason why your light son has better luck going faster on it. Try mixing in heavier rollers to try and fine tune the trans if/when everything else is sorted out.
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Saiga12
Junior Wrench


Joined: 17 Jul 2010
Posts: 3
Location: Taupo NewZealand

PostPosted: Wed Aug 11, 2010 9:24 pm    Post subject: Variator kits Reply with quote

Hi
We have a shop in Auckland NewZealand which has a wealth of knowledge & also heaps of parts - www.Scootling.co.nz - have a look at their online shop - cheers for the input
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