Tune up a varadero 125

[felix]

Help anyone, there has to be a way to get more power out of my varadero 125.

if anyone has any suggestions at all please tell me


felix

[MultiSync]

This ones easy,

Go buy an NSR
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[zaknafien]

firstly, sell it and second, buy a better 125
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02 Firestorm.

[craigT19]

get um to take off that bloady hugggeeeeee cylinder that dose nt doo any thing that should reduc some weight
remus do a pipe for it

ohhhh or bye an nsr and stick varadero 125 stickers on it
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Bikes owned :- 2001 nsr125, 1999 zx6r, 2006 yzf-r1, 2009 xmax 250, 2012 yzf-r1, 2015 MT-07
Current bike : - 2016 MT-10
BCF member pops. sadly missed 1945-2003

[Keen]

can you not change the gearing to get better acceleration or top speed, depending on which way you go?

or what about fitting different rear sprockets. Bigger means more acceleration and smaller higher top speed. That should work shouldn't it? kieth?

[McJamweasel]

Go visit a breakers, buy an engine from an NSR and sell the engine from the varadero. That should help.
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[Stevo]

Sorry mate, but performance is the one thing you'll never get from a varardo 125. Its just too damn heavy at 149kg!! Thats tragic for a 125. Theres just no hope for a Varardo. An XLR125 that had a few breathing mods done would go faster than the Varardo, due to it being significantly lighter. If you want to go quicker at 125cc then you need another bike.

[G]

149kg... omg, didn't realise they were that bad... and with a 4stroke 125

The ZX6 has got about 20kg more but allmost 10x the power.

[Stevo]

Yep i agree that the Honda is a porker alright, theres no excuse for a 125 weighing so much! I wonder how heavy those custom v twin 125s are?
G, when you compare it to our bikes like that, it would make the zx6 almost seem scary, just as well we know otherwise innit!
Can just see some kids having their first ever go on a bike like a Varardo doing their CBT, and the instructer coming over telling them that a 600 weighs a tad more, and has another 100ish bhp! Dont think that theyd wanna try one for a while eh!

[Shamrock]

Felix had an NSR already guys!
Obvisiouly you wont be trying to out accelerate race bikes with the Varadero but is there a way to tweak more power from its big V-Twin engine?
It may be slow but it sounds great for a 125!

[tanner18]

[u][u][u]125 cc +4stroke[/u]= [/u][/u]a very fucking slow bike
149 kg[u][/u]
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inline 4's rule

[James]

Thing is Felix, you're bike is a four stroke 16-valve Single Overhead Cam 90° V-twin and is Liquid-cooled. That in theory should provide a torquey yet high revving reliable bike. Only problem is mate its a 125, and each cylinder only displaces around 62cc.

As four strokes go thats about as much power as you're gonna get out of a 125. The main mods you can try will be K&N filter, unrestricted Crankcase breather and re-jetted to name a few.

You cant have cylinder head skimmed becuase as i remember that bike already has a compression ration higher than 10:1, and skimming it will make compression even higher resulting in possible detonation.

If i was you id leave it standard and have a reiable economical bike, until you can something bigger.

Good luck anyway
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Like shit off a stick

[Lukaz2205]

I know this is bringing up an old thread, but its alot more easier than you think, if you got the money for it.

I've been toying with it as i have a spare engine and being a motorcycle mechanic, can do alot of things myself.

My bike is a 2005 Carb'd Varadero but i also have a 2006 bike which is personal spares.

Looking at major engine and fuelling tuning, based on the weight loss, and the power gains, i dont see why my bike shouldnt be able to produce 22.5BHP.

although once im going to bore it out to from 48mm bore to a 52mm (anymore than this you will go into a water jacket! and just for sh*ts and giggles whack some Hi comps in,

The major "restrictions" are Exhaust headers, airbox and fuelling,

the exhaust headers have a core tube restriction in the front header and a manifold and pipe decrease on the rear (ever notice the different sizes between the 2 pipes?)

The front header has a O/D of 36mm with a wall thickness of about 1.5mm and the rear has a O/D of 25mm with same wall thickness.

the reason for this is basically honda being smart and using back pressure to basically restrict the motor by its self as the front cylinder with get slowed by the rear, because of the effort to push gases through a smaller diameter pipe. (blow through a calypso drink straw then through a normal one, same principle) and its like engine braking in reverse.

you can either get a set of new headers made up custom to remove it and increase the rear cylinders pipe from the 25mm to the 36mm, but there is frame clearance issues, unless you go round the outside of the frame. (Dont be fooled into thinking the Motad headers etc are all unrestricted headers as they have them in, probably to stop being sued by Honda)

You can get sports cans for it, but to be fair they really only make a louder noise, at most you may get an extra BHP after all the work from it.
i've gone down the route of modding the standard can and knocked 2 of the baffle plates that are tack welded in and its ready for the tip to be welded back on for testing.

You can get a little more top speed running the valve clearances a bit looser (known from personal experience and tested by genuine source), i dont know remember what they were before i did it,

I managed to clock 92.2 Mph on a standard motor, standard exhaust, running 99 Octane Super Unleaded with NGK Iridium Spark plugs, as i got done for speeding by the police on my way to work one morning and they measured it over a mile dead with their VASCAR system.

The airbox has a rubber bung in the lid under the tank on the carb'd models 2001-2006 its at the rear and the FI bikes 2007- on its at the front.
There is the option of playing with the power curve by changing the shape and length of the inlet tracts in the airbox maybe for more low down grunt they use the ones from the VT125 Shadow?

and the fuelling is slight issue as honda put smaller jets in the rear carb due to cooling but not only is it water cooled, they use the same heat range spark plugs, so it cant be that much of an issue, if you had serious issues with cooling on rear cylinders you'd go down a heat range.
I use NGK Iridium Spark plugs as i find they make the throttle response more crisper and it does actually go quicker! (*note* all Varadero's made as of 2007 (FI) Iridium Spark plugs are OEM Fitment)

End result and thats including new camshafts, free flow filter, Jet kit, the bore out, high comps and maybe a ever so slightly thinner Head gasket and all the other add ons and there is a possibility of "achieving" 25-28BHP.

and with the weight loss i've committed to doing on it, i think a genuine 100mph on one is possible, after a wreck i've already binned the front plastics and streetfightered it, and there is gonna be more weight saving, but thats gonna involve more carbon fibre lol

I'm only doing it as it makes it more different, yes you could try and slot a different engine in, but wheres the fun in it?


I hope that this Helps anyone who's not afraid of a challenge and the costs involved.

I actually have the Genuine Honda Workshop manual so if you need any specs i can try to help.
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