[Solved] Struggling to get past 45 mph Aquila GV 125 2004
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Bike Model = : Aquila GV 125 2004
Hi everyone,
Looking for some advice with my bike as I’m running out of ideas.
The bike has been running badly and seems to be running lean/poorly under throttle. Symptoms are:
- Bogging/ feeling like a rev limiter at 7000rpm
- Poor running especially under load struggle to get past 45mph
- sometimes going through rpm it’s sticking at certain points
- Occasionally feels like it wants to die
- Bike has an aftermarket exhaust fitted
- One spark plug was heavily black/carbon fouled while the other looked more normal
So far I’ve done the following:
- Removed and fully cleaned both carbs they looked alright!
- Removed main jets and pilot jets
- Sprayed carb cleaner through all passages and holes
- Checked the diaphragms and slides
- Cleaned emulsion tube area/passages
- Inspected airbox boots/connections hard to tell
- Fitted fresh oil
- Bought new NGK plugs (currently sorting plug cap compatibility)
The stock main jets are 82.5 and I was considering going to 90s because of the aftermarket exhaust, but I’m unsure if that’s masking another issue like:
- vacuum leak
- weak spark
- carb sync issue
- diaphragm issue
The carbs are an absolute nightmare to remove/refit on this bike so I’m trying to avoid repeatedly tearing it apart unnecessarily.
Based on these symptoms and what I’ve checked already, what would you guys look at next
Any advice appreciated
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before refitting, did you consider replacing the intake manifold rubber O-RINGS , as these are known to cause hidden leaks causing all kinds of boggy behavior . If fitted already, spray carb cleaner around the intake pipes to see if revs change ?
Does it start without choke when its ice cold ? its a small tell tale sign if things are good under the hood, and normally it should not need it heading in to summer now.
To rule electrics out, check this link below and report back with your figures?
Rectifier – How to Test Stator , Battery , Regulator – GT125R Carby
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thank you I’m going to give that a go I need to replace sparks first turns out the previous owner was just pushing the HT caps onto the plugs instead of screwing them onto the threaded tops properly. They held on, but I’m wondering if that could have caused weak/intermittent spark issues, I’ll put all together tomorrow hopefully, try my best to get these carbs and airbox back on without breaking the boots 🤞🏻
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It must have been the moan jet was blocked cause took her out for a spin after cleaning everything and re clamping everything and she seems to running perfect now no sticking at higher revs, also added a fuel filter and tested for leaks with carb cleaner and was all good so I’m happy camper just now!
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It must have been the moan jet was blocked cause took her out for a spin after cleaning everything and re clamping everything and she seems to running perfect now no sticking at higher revs, also added a fuel filter and tested for leaks with carb cleaner and was all good so I’m happy camper just now!
Happy ending!
Hold tight a few more days, your special part is due to leave later in the week and i believe EVRi will come or RM , but i will definitely edit the order to reflect your new email address, email us by Thursday if you hear nothing!
Take it easy out there!
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It must have been the moan jet was blocked cause took her out for a spin after cleaning everything and re clamping everything and she seems to running perfect now no sticking at higher revs, also added a fuel filter and tested for leaks with carb cleaner and was all good so I’m happy camper just now!
Happy ending! Hold tight a few more days, your special part is due to leave later in the week and i believe EVRi will come or RM , but i will definitely edit the order to reflect your new email address, email us by Thursday if you hear nothing! Take it easy out there!
Can’t wait to get it !!!
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