Can anyone help with acceleration power on a Gilera DNA 50cc

[bobstar]

Hi there,

I need some advice on how to increase the take off power on a Gilera DNA 50cc. Top end its fine when it get there 50 - 55mph. I know it's no speed demon but the acceleration is terrible. Push bikes takes off faster, can't even turn into a road unless the road is really clear.

Things I know and have done after we've bought it:

It came with a racing exhaust but apart from that nothing else that I can see. I took it to some ped garage and they told me to installing a new belt and some roller and that should improve it. But this didnt made a difference. It revs high but if you put both of your feet down, the bike will just rev up and not move. Have to push if of with my feet to get it going. I've notice that when starting it from cold the bike tend to have a little bit more kick to it but not much. Its after when you've riden it for about 15 20 minutes onwards the acceleration power tend to vanish. I've been told to change the clutch and the flywheel?

But before I spend any more money on it I was hoping someone who has experience this or could possibly enlight me on what could be the problem? That would be most helpful

Many Thanks in advance.

Bobstar

ps. If you gonna tell me to get a real bike then I ride a 07 R6. I bought this for my G-friend as she doesnt have a CBT or a bike licence. But Her current driver licence entitles her just, to ride only a 50cc. And she likes the look of it!

[ian789]

Ride it off a cliff

[N cee thirty]

maybe you're just fat
____________________
'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[hmmmnz]

pretty impressive that you have managed to get 55mph out of it,
it sounds like the clutch is buggered on it,
they are fairly cheap for a heavy duty one,

good luck
____________________
the humans are dead
I kick arse for the lord
Wiring Diagrams BIDNIP it bitches

[bobstar]

I would but it's not mine.

And nope, not fat either. Does the same if Im not sitting on it.

Thought this a workshop for advice?

[bobstar]

Thanks hmmmns,

That was my next move, just wanting to see if there could be something else wrong with it.

Cheers

[hmmmnz]

like all things, they wear out after time,
it may just be the springs on the clutch, put you may as well change the
clutch pads at the same time as doing the springs,
____________________
the humans are dead
I kick arse for the lord
Wiring Diagrams BIDNIP it bitches

[DrDonnyBrago]

A little off topic; but... regardless of entitlements there is no chance in hell that I'd let my gf out on the road on 2 wheels without training!!! Not to mention that a moped that goes 55mph wont be legal for her to ride on a cat P licence anyway.


As for the actual bike though, it runs better when the air is cold because cold air is denser and thus contains more oxygen per unit volume that warmer air. I'd go with the clutch being worn, that you are able to hit over 50mph on it suggests the engine is working in a half decent manner and the other thing that you have already checked/tried is roller weights.

[cb1rocket]

clutch or the drive belt is worn, roller weights rarely need changing. They could do with lighter ones if needed, but you loose a bit of top speed

[Bob_star]

[Bob_star]

[Bob_star]

[cb1rocket]

is the exhaust blowing? a leaking exhaust as I have discovered on most scooter at the exhaust port can lead to loss of bottom end power and pwer overall.

With performance exhasut the main jet is generally upgraded. and lighter roller weights are added.

(some may think you need heavier weights but the power is more peaky and the powerband becomes narrower)

I don't know the history of the bike performance beforehand, but has it been like since you had it? or has it developed into the problem?

[cb1rocket]

sorry i don't know about the weights needed, but sometimes its just worth experimenting with them

[Bob_star]

[Bob_star]

[cb1rocket]

a main jet is what controls the fuel mixture ratio when the throttle is above half open

this can be found in the carb body by taking off the float bowl (bottom part of carb)

probably worth checking the spec of main jet, probably still the stock one installed, which would result in a lean running

[Crafty]

[TUG]

Listen mate, its never gunna run right with a race pedboi zhorst on and non standard parts.
Put it back to stoke like mine was and it will hit 45-50mph and accelerate perfectly.
When you play about with low cc engines like these you need to be an engine tuning specialist then an automatic transmission specialist etc etc, spend loads of cash that you could of put towards buying a bigger better bike or a blow job off a lap dancer.
____________________
Haz ER-5, innit!

[Crafty]

[TUG]

Thats really nice crafty, but the comment was aimed at the OP.
Pissing around with italian 2 strokes is asking for a world of hurt and expense. Just use it and upgrade to a bigger bike.
____________________
Haz ER-5, innit!

[Crafty]

[Crafty]

[cb1rocket]

i agree get a bigger bike or a proper 125

anyway back to subject, my money (and giving it a bit more thought) would be on the clutch, which could possibly be well worn. And also the weights in the variator. Go for really light rollers and give it a shot. despite that, 55mph once going is pretty good. But as other have said, the exhaust is probably making the power really peaky and delivering it only in the top end power range, with no bottom range power.

Remember 2 strokes are almost like turbo chargers, until you hit the desired rpm, then the power kicks in.

Its quite noticable on my little H100 2 smoker

So in my conclusion try the weights and check the clutch for wear

[fbl]

I know this is a bit late, however, what you need are some rollers, and a polini variator kit