hi guys, i have just brought a gilera dna 50 2006. and have a couple of questions if you dont mind 1st ) i think the bike has had a non standard exhaust fitted to make the bike faster but i will be putting a standard exhaust system back on. some people have told me that the rollers may have been changed as well so will i need to change the rollers or can i leave them in if they have been changed ( can i add i have no idea what rollers are ) 2nd ) will any gilera dna 50 exhaust fit the bike or do i need it to be from the same year or a certain year range, thank you for any help.
The rollers will affect how the bike runs, different exhausts create power at different rpms, the rollers effect at what rpm the variator expands to push the drive belt higher. The stock exhaust will normally require heavier rollers due to the difference in power. If you dont change the rollers its likely the bike will perform crap. Also note that you might have to rejet the carb as the sports exhaust will use a bigger jet over the standard exhaust. Im not sure about the exhausts for dna's but i geuss find one from the same year range and you shouldnt have a problem
ok thank you. now i have another issue then have do i find what rollers are in the bike? where do i find them? and what are the stock rollers that i should buy and put in, i wish i was a mechanic,
changing rollers is simple! this explains it ok http://www.petrolmag.net/view/artic...changing-rollers-or-replacing-the-drive-belt/ heres a list of stock rollers just find your make and model. http://www.beedspeed.com/html-pages/variator-roller-weights-chart.htm and i'd advise buying a locking tool like this if you dont have an impact gun, makes life alot easier! http://www.pedparts.co.uk/product/768/piaggio-variator-locking-tool
yes you are correct KyleH. i want the bike legal for my son he is only 16 and this is his first bike so i want him doing the 30mph he should be to keep him safe or at least as safe as i can do, and thank you for the links and information its a great help.
I meant no disrespect. My question was simply from the point of view of efficiency. I can appreciate your point - however - depending on what roads he's riding on - I would suggest that being able to keep up with the flow of traffic is safer than being a mobile obstacle. Try riding the thing yourself and you'll get the picture. It's very unpleasant - and dangerous on narrow roads where everyone else is doing 50. Perhaps if you restrict it for a while and then put the decent exhaust back on when you're sure he can handle it. 'Laws are for the obedience of fools and the guidance of the wise' - or somesuch........ If you're going to change rollers - have a read of this: http://www.pedparts.co.uk/blog/variator-fitting-crankshaft-pulley-spline-damage It could save you some money - best regards
i did not think that you meant any disrespect at all, you have a point of view as do i, the reason i want the bike as standard is i would prefer my son to crash at 30 and not the 50 or 60 that he could do with an unrestricted bike, he has no experience to handle a bike at that speed, the roads he will be using as well are max of 30mph so again he has no reason to go any faster than that.
I fully sympathize. My girlfriend started riding the scoot (I bought her) about five years ago. It gave me grey hairs. She started off with a standard machine and I had the same attitude as you - and it's the right one to have. Five years on - and 25 miles a day later - I'd never let her near something that wouldn't do 50. On her daily run to work she needs the oomph to keep out of trouble. Have a look at the link above. It explains how not to wreck the crank when you reassemble. Good luck -
i agree with you in general that you need some power to get you out of trouble and to allow you to run with the flow of the traffic. issue is here that a 16 year old with no experience at all and possibly no common sense especially when girls are around giving him the ability to really hurt himself or others is really not something i want to do right now, like anything if he can prove that he is trustworthy and capable then the extra power can be something i will think about, not forgetting as well you increase the power your bike is no longer legal to ride, your insurance is invalid, the police have instant right to take your bike off you and crush it, he will lose his license,
Good points - all. They should allow hot scoots and punish no sense ! Or maybe ban hot girls from bus stops . I dunno !
From my experience restricted bikes are more dangerous. Drivers pass you dangerously and through abuse at you for 'going slow', also you dont have any 'road prensence' as your constantly riding the gutter. My bike sits at 60mph and im 16, yes it may be illegal but ive never had any trouble with the police and i find cars give you abit more respect.
Just my tuppence worth but I went through the same thought processes about a week or so ago about re-restricting my sons scooter. It was not right when we bought it. I had a feeling that the previous owner had attempted to de-restrict it but had run into problems. Sorting out and repairing the faults, he has now ended up with a 50 cc scooter that does 50 mph instead of breaking down every two miles. I was really reluctant to go this route to begin with. But during testing I found out what doing 30 or less is actually like. It feels very wrong on the back country roads we have locally. It really needed to do a minimum of 40 mph, maybe a little more, else the result is a long line of impatient drivers who will overtake dangerously in 40 limits etc. After all the worrying I went out with my son. He was very sensible and rode not that fast but reasonably with the traffic flow and inline with his limited experience, so I should not of worried much at all. I'm now much happier he is on a scooter that: a) Doesn't break down, b) Is not a sitting duck for the local drivers PS normally I would have not attributed so much sense to my son lol. But self preservation appears to be a powerful instinct
Agree I currently am riding on a rental its restricted to 32 mph and it really is dangerous iv actually been hit by wing mirrors 3 times and nearlyy had full on scrap with 2 drivers abuse all The time and multiple nearly coming off due to other car users anything under 50 mph is dangerous in my opinion
