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Post by mathewgts125 on Mar 30, 2023 18:57:28 GMT
So here’s the back story,
I had the engine rebuilt professionally. The scooter ran fine for a short while, now when the engine was rebuilt the shop put a pinasco equivalent carburettor on and did away with the dellorto carb which I actually didn’t ask for I’d have rather kept the original carb.
I had a pinasco exhaust put on the scooter and it wasn’t tightened on correctly so I tightened it up, now the scooter won’t do over 50mph just sits. The scooter flies through the gears but once I hit forth gear it just sits at 50mph and won’t budge
It’s running a 100 idle jet and a 110 main jet, I’m tempted to up jet to see if that works?
The spark plug is a lovely tan colour
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Post by adrian on Mar 30, 2023 19:25:18 GMT
Have you checked the cylinder studs are still done up correctly? Did I go faster before you tightened the exhaust??? Is the carb seated correctly. Will give this so thought 💭 and add if I think of anything. PS nice introduction 👍
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Post by mathewgts125 on Mar 30, 2023 19:27:36 GMT
Have you checked the cylinder studs are still done up correctly? Did I go faster before you tightened the exhaust??? Is the carb seated correctly. Will give this so thought 💭 and add if I think of anything. PS nice introduction 👍 Yeah the cylinder studs are correct and carb seared properly. This happened a few times prior to tightening the exhaust up. And now is constant. Thanks for reply |
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Post by ironsloth on Mar 30, 2023 19:46:17 GMT
When it gets to 50, is it screaming it’s nuts off or is it struggling like hell? I think it could be the carb 😶🌫️🧐
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Post by mathewgts125 on Mar 30, 2023 19:49:22 GMT
When it gets to 50, is it screaming it’s nuts off or is it struggling like hell? I think it could be the carb 😶🌫️🧐 It seems to be sat at low revs and doesn’t want to go any higher, we all know how T5s like to scream, this is more a steady burble and doesn’t want to go any further. I’ve just remembered I haven’t checked it the fuel filter is clear/clean so will do that first thing. And if that’s blocked that could be the answer. |
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Post by ironsloth on Mar 30, 2023 20:09:40 GMT
Wonder if it has got the wrong carb on it, like one from a 200cc?
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Post by mathewgts125 on Mar 30, 2023 20:23:12 GMT
Wonder if it has got the wrong carb on it, like one from a 200cc? It’s a Pinasco 24g carburettor, the shop in question that fitted it have a very high standard of work, I’ll not name them due to backlash/bad feelings. But I do trust they’ve fitted the right carb, However I’ll give it a clean and if that doesn’t fix it see if I can borrow/ purchase an original carb and see if that does the trick 👌👍 |
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Post by gpowell on Mar 30, 2023 20:45:25 GMT
The carb is correct as its a g type, cant see that being a problem as its new and they are all made by Spaco.
I would be looking at electrical as it sounds like it cannot rev.
Also you said its happened a couple of times previously and now its permanent.
Can you borrow a stator and cdi off someone?
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Post by mathewgts125 on Mar 30, 2023 20:51:55 GMT
The carb is correct as its a g type, cant see that being a problem as its new and they are all made by Spaco. I would be looking at electrical as it sounds like it cannot rev. Also you said its happened a couple of times previously and now its permanent. Can you borrow a stator and cdi off someone? Unfortunately I couldn’t, it had a new pinasco fly tech electronic system on it say 6 months prior to engine rebuild, stator, flywheel, CDI, HT lead etc. I’m hoping that hasn’t gone wrong? Surely if it was electrical regarding revving would it not do that in every gear? Rather than just 4th? It screams as it should in every other gear? |
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Post by scooterbooter on Mar 30, 2023 21:28:03 GMT
Are you hitting any power in 4th? You may not be getting enough power to hit band. What gearing you on? Your revs may be too low for an expansion pipe. I don't know.
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Post by mathewgts125 on Mar 30, 2023 21:31:22 GMT
Are you hitting any power in 4th? You may not be getting enough power to hit band. What gearing you on? Your revs may be too low for an expansion pipe. I don't know. Standard gearing. I have it flat out in 3rd untill it can’t go any further, drop into 4th and the rev drop right down and it just sits. The pipe that’s on it is designed for a standard T5. I’m wondering if it’s fuel starvation/air starvation and it’s just not getting enough at higher speeds? |
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Jock
High Number
Posts: 184
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Post by Jock on Mar 30, 2023 23:52:20 GMT
Hi I would go back to shop , get your carb back, as it is your property - regarding your problem , what colour is the spark plug -you might possibly have a leak some place , sucking in air etc , blowing head slightly ? shine a torch in the petrol tank to check the filter , oh timing might be out , check with a strobe , hope you get it fixed  |
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Post by soulboy74 on Mar 31, 2023 9:03:34 GMT
Might just be a running in problem after a rebuild!! Slowly slowly to start with ,! Get your old carb back as you well might need it again !! Check your jet stack is right for your set up ! Air correction jet !! And main jet is not to big !! But Hay mate just run it in slowly !! Best foot forward soulboy74 🏴
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Post by scooterbooter on Mar 31, 2023 10:46:16 GMT
OK you should be getting power, how strange. Oh man yeah I hate saying this but yeah dude 'what was the last thing got changed?' That's normally the culprit. Proper little culprit. Good luck. I'm interested to see whagwan here.
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Post by scooterbooter on Mar 31, 2023 10:47:43 GMT
Defo take back to the shop. They wouldn't want an unhappy customer.
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Post by mathewgts125 on Mar 31, 2023 10:49:37 GMT
So found a little debris in the fuel filter on top of the carb, and a slight head leak running between top of barrel and head, tightened everything back up,
also going to try a 115 main jet, was always told that with exhausts you may need a larger main jet, so will try that aswell.
It’s currently on a standard 110 main jet, so won’t hurt to try it out I suppose.
See what happens next.
Just a shame the weather isn’t up to it 🤦🏻♂️
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Post by scooterbooter on Mar 31, 2023 10:50:53 GMT
Does not sound like fuel starving, I've just had that plus it would show in other gears. But don't rule it out like, I can't see it. You can.
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Post by mathewgts125 on Mar 31, 2023 10:54:12 GMT
Does not sound like fuel starving, I've just had that plus it would show in other gears. But don't rule it out like, I can't see it. You can. Cheers mate, it’s a little frustrating as I’m quite a novice at this stuff but will always try do my own fault finding and work when I can. The only reason I had it to a shop to rebuild the engine was due to lack of space at the time. I couldn’t get the running right prior to tightening the exhaust up, as that was letting in air. And 99% of issues have come about since doing that, very tempted to slacken the exhaust off a little and try it again 🤦🏻♂️ I only noticed the exhaust was loose due to the amount of spit back on the side panel and foot trim. |
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Post by mathewgts125 on Mar 31, 2023 11:46:11 GMT
Update.
I’ve put a 115 main jet, scooter is generally smoother throughout….
4th gear revs don’t drop off and scooter steadily rose to 60mph give or take, it’s still a little hesitant but doesn’t sit flat like before.
Thoughts?
I think I’m gonna run it around on a 115 main for a short while see how it behaves, if it’s still hesitant I’ll up the jet slightly again, could is possibly be that this exhaust requires more fuel to perform
Cheers
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