Argh! Too slow

[Josh|RD125LC]

I have a Honda MBX 50 at the moment and its really slow. If anyone knows how to improve the MBX's performance then any information will be much aprreciated. Thanks.

[steve09]

Wack a mbx 80 engine in it as there restriceted in the cylinder so unless u buy a new big bore kit for you 50 engine u may as well buy a new engine for it im pretty sure the 80cc engine has an extra gear,
check out www.50cc.nl for good perfomance parts, i used to have one of these as a feild bike and with a 80 engine and a bitta work and a nice pipe they will do 70 odd easy
cheers
steve

[Josh|RD125LC]

thats a good idea but im 16 and cant ride more than a 50cc. Any other suggestions?

[steveh]

working on first impressions here u seem like a "responsable" rider, what most people do is get a 70/80, engine/bb kit put it on and ride around (not telling you to do this) but its what people normally do, altho this makes your insurance and licence invalid, but aslong as u stick to the limits, drive sensible, display full L-plates and generally ride like you care, then you should be fine but be aware u will get done for this depending on how the old bill feel at the time.
The choice is yours really, i do understand were your coming from as 50cc's are slow but hey weve all gotta start sumware.


Steve.
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Current : 06 Zx10r, 07 Wr450f SM, 74 850 norton commando, 63 bsa b40, 1962 Triton 650, 67 Triumph Tr6r, 1955 Triton 750, 1978 TY250E.

[Kickstart]

Hi

The MBX80 was a liquid cooled engine rather than the air cooled engine on the MBX50.

The MBX (from memory) was quite difficult to derestrict and quite heavily restricted. It is basically the same engine as the MT5 (another heavily restricted Honda).

Think Micron used to make an exhaust for them.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Ninja]

H100 engine painted black...
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James
4 wheels transport the Body ... 2 wheels transport the SOUL

[Josh|RD125LC]

So basically buy a big bore kit (70cc probably) and ride around sensibly (which is what i do anyway). Sounds good. I have been looking on www.50cc.nl and I have been told that cylinder kits from the MTX50-SH will fit my aircoold Honda. Is this true?

Yes I think they did make a micron pipe for it because I think I have one fitted at the moment. Well it looks like a micron anyway. Thanks for your help.

[jamie192]

Can u not get like a new exhaust kit for it or something like a micron, itll make it sound way better and faster.
I know with the big bore i have, the outside is exactly the same as on the 50 bore (not fitted on my bike by the way). But i know people who do have 80's on theirs, when they get stopped by the police they say" i brought it like this" and can the police arrest you for being "ignorant" to the engineering side of a motorbike? As they do not test for it in the mot, and unless u strip it down the only way you can tell is if it can do 50-60 mph, but if u dont do that when there is a police car around you should be alright. Concerning insurance, normally for them to strip your bike down to see that you do not have the right bore on, its likely to have of been serious enough for a death most likely the motorbike rider. I have not got mine fitted i am planning on using it for when im 17 as im having my mums car as well mazda mx3, although i would rather a kawasaki zxr400 restricted to 33 bhp but i dont think i have the money to buy and insure it and take my full test.

Good luck with making it faster, other alternative get a derbi gpr as ive heard there not restricted and can do more then a normal 50( so i have heard)
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Ride Fast, Brake hard, don't fall off!

[Josh|RD125LC]

I think I already have a micron pipe installed. It does sound decent but the speed certainly is not decent. Why don't you fit the big bore kit to your bike now?

[mrchips]

I had an MT50, assuming they are the same chassis you should get a Honda H100 engine into it. Failing that 50cc.nl is the way to go.


On a personal note, I stuck to 35mph for a year. As horrible as it was, it made me appreciate my 125 more and I had more money to spend on a 125/test cause I wasn't spending it on big bore kits.

[Kickstart]

[Ste]

As the rider or driver of a vehicle it is your responsiblity (in the eyes of the law) to be sure that you're allow on the roads and everything is legally roadworthy. Earlier in the year Honda had to recall the CBR600RR as they had under reading speedo's and people had been getting speeding tickets, the fact it wasn't the riders fault doesn't come into it, they still got points and/or a fine.

[skyline]

ok ok a bit of more information here 50cc tuning wise. first off how much do you have to spend? secondly, getting just a 70kit wont do much, if you were to get a 70kit you would need a bigger carb and a race pipe to go with it, also meaning you may want racing reeds and a racing crank, but unless you are going to get a decent 70kit you may find more performance from a top notch 50-60kit, also depends on what kit you get to what exhaust and carb you will need as some kits are high reving/low reving/ medium reving etc pop to the 50cc.nl forum as they are the 50cc tuning bods over there...but like mr chips said, i wouldnt spend money on a 50, i regret spending my money on my 50 and i know alot of others did, as you will never get it back, and the bike will never be that fast to be honest...

[Method]

I passed my CBT on a Gilera GSM50 and that did 40mph tops. there realy is no point in worrying about a 50cc's performance in my oppinion, if your serious about biking maybe you should think forward a bit, rather than trying to show off on a 50... a legal 50cc will never be that fast, and in my oppinion its not worth trying. Why not just hang on till ur 17 and grab yourself a sexy 125 like me i wouldnt have my 2002 NSR if i had wasted my time on a 'Big bore kit' and 'Micron exhaust' lol. If you want a fast bike, save your cash untill you've taken your full test! even buying myself a lovely 125 has seemed to be costly as i now am looking to take my full test and barely have the funds

[Kickstart]

[Josh|RD125LC]

Yeah I think that I will be able to put up with it's speeds. Its not too bad. And like you say, look forward to a faster 125. RD125LC here I come! As I say, good things come to those who wait.

[goblin30]

If you go for a big bore or a bigger engine surly you have to think
about the brakes coping with higher speeds.

goblin

[mchaggis]

[Ste]

I know people say the brakes might not be able to cope, is there anything in the brakes which would actual break or die, or is it just the brakes won't be very effective, I mean surely you could if you really wanted put the brakes from a 50cc onto a R1 and it would just take ages to slow down?

[mchaggis]

[Kickstart]

Hi

You could try and find a front end from an MBX80 which had twin disks. However the 50s brakes should be fine, and the caliper / pads are the same as those used on the MBX125.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Ninja]

[jamie192]

[RS1Banger]

my moped does 85, but i'm not 16, have passed my car test
i would only get done for no L plates
if i was gonna ride a 30mph ped, it would have to be twist'n'go as there's no point changing gears to only get to 30 or so

[TheShaggyDA]