Speedfight 2 Air cooled slow??

[Amlet]

Hi, about a month ago i bought my speedfight2 (2001, fully derestricted), it has done 14,000 miles but yet its top speed is only 40mph?? . I took it to the garage I bought it from (not knowing it is air cooled) I asked him why and he said the air cooled are slower than liquid cooled. Is this true? also what other things could be hampering my speed e.g. worn rollers etc.
Any help and comments would be greatly appreciated! Cheers

[ms51ves3]

Air cooled are slower than liquid cooled but you should still be able to get about 45mph out of it.

To be honest though, 40mph is fine, I wouldn't worry and just ride the thing.

[Andy levitt]

yeah its only a 50, and 14000 miles is a fair bit of miles for a 50 in the first place. Try the rollers, heavier better top end but slower acceration and vice versa. Also buy a sports pipe if you havent already and maybe clean the carb. Although dont be expecting too much from it lol
____________________
Speedfight 50 -> Honda NSR 125 -> Y reg YAMAHA YZF R6 -> 08 YAMAHA YZF R6 -> Honda CBR1000RR
Theory test Done 4/6/07
Practical test Done 21/12/07

[Amlet]

I am looking to achieve 55mph though as I need to drive through a dual carriage way nearly everyday and 40 is dangerous as people overtake me. What sports exhaust could you reccomend to imrpove top end performance?

[ms51ves3]

My CW50 is part de-restricted (No washer in the variator) and my top speed is about 40mph give or take. As the engine still has a power restriction on it, it can't get up to the 45mph that I would predict is the top speed.

My guess is that there is lots of carbon in the exhaust thus not giving you enough power to get upto 45mph.

Try de-coking the exhaust.
If you're wondering what it is use the search function at the top of the page (or google)

[Amlet]

I think I have already done this, are you reffering to the bit on the end of the exhaust that can be detached with an alan key? If so I have cleaned it already

[ms51ves3]

[Amlet]

A bit of research shows that 50-55 mph is quite realistic ,
https://pop.youtube.com/watch?v=T03UhUjncpg&feature=related

[ms51ves3]

That's an indicated speed
Realistically you will never get more then 45mph out of an air cooled 50cc. Deal with it.
Plus when you put a sports exhaust on a scooter they sound shit

[Wave2k]

My speedfight 2 50 AC used to just about hit 50 (was like 60 indicated).
Had a leovince exhaust, malossi variator, belt and clutch.
Those were the days, also they are just slow.
____________________
Ducati 1299 Panigale
2009 Corvette C6 z51
RS125->CBR400->RXS100->GSXR750K2->Ducati749S->CBR600RR5->TL1000R->DRz400->RSVR1000->Honda VTR SP1->CBR400->GSXR1000K6->Honda H100->CBR600RR3->Ducati1299

[Amlet]

How much are the malossi variators and where abouts can I get them from? are they easy to install or should I just take it to a garage?

[ms51ves3]

Now you're getting into tuning. You're best trying to de-coke the exhaust so it will do 45mph and leaving it at that. An extra 5mph will not make it any safer to ride on a dual carriageway.

As Wave2k said. He got 50mph from putting £200 worth of extra stuff on it (That's just a guess but I'm sure Wave2k will tell you how much it cost him) for an extra 5mph. Doesn't seem worth it to me.

Just out of interest are you 16?

If you're 17 or older have you ever though of buying something like a CG125. That will easily do 55mph. Maybe even hit 65mph

[Andy levitt]

Buy a leo vince zx there a decent pipe and offer proably best performance than any others although ull get around 45-50 mph at most. If you really want more out of it and cant wait for a 125 then get a 70 cc bore kit and gear up kit but well its your choice and that you proably get you up to 60 mph
____________________
Speedfight 50 -> Honda NSR 125 -> Y reg YAMAHA YZF R6 -> 08 YAMAHA YZF R6 -> Honda CBR1000RR
Theory test Done 4/6/07
Practical test Done 21/12/07

[tutton]

Ive been told getting the bigger bore kits on.
Are likely to fuck your crank and mush it up no end?
____________________
Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[ms51ves3]

[tutton]

Because itd be worth fitting a racing crank to a 50cc.
for 5 mph gain o dear.
____________________
Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[ms51ves3]

[tutton]

My liquid cooled one only did 55 indicated.
although no upgrade to it just deres.
cant be asked spending money on a 50 other than cosmetically.
____________________
Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[Deano]

I have a AC speedfight 2 50 which I use for my commutes and is billiant for doing that, like you i wish it could do about 60mph.

You may still have the vairator backplate still in there. once took out mine, it then started doing an indicated 50mph. I could use to be able to only do that when going down a hill.

your exhaust will have a collector pipe which is a restrictor if you can get this cut off then the hole welded over and air tight you should get more top speed.

If you live local (hounslow, middlesex)you can have my leo vince pipe off me cheap.

[Amlet]

Cheers for the info everyone ( and the leo vince offer , but i live in manchester) . I may decide to purchase the 'Malossi multivar variator' , If i do will this increase the speed of the bike accompanied with a racing pipe as opposed to a racing pipe with the stock variator and rollers? Cheers

[ms51ves3]

[tutton]

^
Amen.

____________________
Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[Deano]

a malossi multivar in a standard engine and exhuast will make it slower.I know coz i did this myself expecting to gain some speed but did the opposite.

get the exhaust if you do decide to buy anything, then get the multivar if you want.