big bore kit 70cc

shaunt6 · Borekit Bruiser Joined: 19 Feb 2011 Karma :

just blew up my 50cc , has never been tunned , im looking to buy a big bore kit and not sure what one to get iv found a few big bore kits and im looking to spend about 200 - 250 on a decent big bore kit , which one would be the best for that money , bike is a derbi senda 2006 off-road

0ddball · World Chat Champion Joined: 15 Jul 2005 Karma :

Get a 125
____________________
ZXR750L

shaunt6 · Borekit Bruiser Joined: 19 Feb 2011 Karma :

i cant afford to get one yet :/

Nope. · World Chat Champion Joined: 17 Feb 2011 Karma :

If thats your budget and your having to ask this then I really wouldnt bother. It'll only seize again or wreck the crank bearings or somthing. Not worth the time and money. Fit a new 50 barrel, run it in and sell it then put that £250 towards a 125.
____________________
Former: Derbi GP1 50, Sachs XTC 125, Suzuki GSXR 400 GK73A, Kawasaki ZX7R, Suzuki DR250, Yamaha RD350
Current: 2011 Yamaha XT660Z Ténéré, 2003 Yamaha YZR-R1 5PW (In Build), 2009 Kawasaki ZZR1400

Lipsmoker · Trackday Trickster Joined: 23 May 2010 Karma :

Not worth wasting the money

your willing to spend £200-250..

you can get a tatty 125 for abit more than that

a 70 kit will gain 10-15mph maybe
also will break twice as fast as your 50
____________________
Four wheels move the body. Two wheels move the soul.

0ddball · World Chat Champion Joined: 15 Jul 2005 Karma :

I just sold a 125 with full tax and mot for £250. Granted it was a chinese bike but it would still be faster than a messed with 50.
____________________
ZXR750L

shaunt6 · Borekit Bruiser Joined: 19 Feb 2011 Karma :

i might be able to get a cheap 125 but to insure it will be alot as im only 16 , and for a original 50 head and piston gaskets it like nearly up to 200 thats why i thourght shall i get a big bore kit

temeluchus · World Chat Champion Joined: 01 Oct 2008 Karma :

125 wouldnt be legal for a 16 year old, but then again the 70cc kit wouldnt be either....
____________________
Some shite cruiser. Now with guns and FREEDOM!

Nope. · World Chat Champion Joined: 17 Feb 2011 Karma :

shaunt6 · Borekit Bruiser Joined: 19 Feb 2011 Karma :

im 17 in 1 month and it will take me ages to save up for a bigger bike and to insure a 125 at 17 its like 650 700 quid and my freind has had aa big bore kit since he brought it back in febuary and nothing has gone wrong with it and its a cm racing 74cc bbk

Nope. · World Chat Champion Joined: 17 Feb 2011 Karma :

shaunt6 · Borekit Bruiser Joined: 19 Feb 2011 Karma :

sorry mate

Wafer_Thin_Ham · Super Spammer Joined: 18 Nov 2005 Karma :

Nope. · World Chat Champion Joined: 17 Feb 2011 Karma :

Wafer_Thin_Ham · Super Spammer Joined: 18 Nov 2005 Karma :

Livefast123 · Nearly there... Joined: 15 Mar 2010 Karma :

As said, not really worth spending the money on a 70cc kit which is going to cost you more to buy, more to run and run the risk of you having your bike seized as you have no licence to ride it. It'll only give you 15 Mph extra and unless you know what your doing will take time and expense to set up.

A much better idea would be to put the bike back to standard, sell it when you are 17 then get a 125 which will be faster and far cheaper to run. I don't know what insurance sites you've been on but try 'The Bike Insurer'

Here are 2 kits on ebay depending on what year your bike is you'll have it back on the road for less than £100.

https://www.ebay.co.uk/itm/APRILIA-RS-50-DERBI-SENDA-2006-BARREL-PISTON-KIT-/160623026615?pt=UK_Motorcycle_Parts&hash=item2565e0e1b7

https://www.ebay.co.uk/itm/DERBI-SENDA-50-UPTO-2006-GILERA-BARREL-PISTON-CYLINDER-/360352002102?pt=UK_Motorcycle_Parts&hash=item53e6a73036
____________________
Current ride - Yamaha MT-07

Rogerborg · nimbA Joined: 26 Oct 2010 Karma :

This again?

£250 is a ridiculous amount to spend to make a bike illegal for P(ed) license holders to ride. If you're going to ride a bike outwith the terms of your license, just get an SV650S. It's exactly as legal (or otherwise) as riding a 70cc bike on a ped license.

Or suck it up, part the ped out, and buy a 125 when you turn 17.
____________________
Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

shaunt6 · Borekit Bruiser Joined: 19 Feb 2011 Karma :

okay cheers guys

Dishdash · L Plate Warrior Joined: 20 Dec 2011 Karma :

Seriously? the guy came on, asking which is the best 70cc kit. And you go into some lecture about how he should get a 125. then when it turns out he cant, you get all upset and moan at him? He asked a question, and then you moan about the question. Shocked

Teflon-Mike · tl;dr Joined: 01 Jun 2010 Karma :

hmmmnz · Super Spammer Joined: 22 Aug 2006 Karma :

if it was me and i was 16 again,
i would tell all these guys to get fucked,
nothing like learning a lesson the hard way Very Happy

i'm double your age, and i'd still tell them to get fucked and chuck on the big bore kit Wink

but, i have a full licence and can afford to lose a few hundred quid,

as it stands, a standard 50cc kit is perhaps the best option,

Doppler do a good 50cc high compression kit with a nikasil barrel
and for big bore the polini kits are always pretty well finished
____________________
the humans are dead
I kick arse for the lord
Wiring Diagrams BIDNIP it bitches

Teflon-Mike · tl;dr Joined: 01 Jun 2010 Karma :

Dishdash · L Plate Warrior Joined: 20 Dec 2011 Karma :

If he wants a 70 kit its pretty likely his bike is alreayd illegal just like 99% of all scooters on the road. You try going down an road at 50 when everyone else is doing 60-70 and you'll realise why he wants that extra 10-15 mph. I have never heard of anyone get done for having a de restricted 50. The cops tend to turn a blind eye because they know its un safe to be doing 30 mph.

bikersupermot... · Could Be A Chat Bot Joined: 26 Jul 2008 Karma :

for sum of us theres sumthin fun about tuning up / over - engineering a small engine to get total max performance. like mental mods - u see em on utube.

ur eitha into it or not. if ur not u go buy a big bike - for the guys into it a big bike just not the same thing - it dont ansa the curiosity / wanting to get max out of a 50cc bike.

i used to hav the cbr1000rr afta loadsa sm's an it jus wasnt my thing. bought it new, 8 months lata i was bord wiv it an sold it.

back to sm's an got 3 now an hav way more fun wiv any of them than eva did wiv da blade.

so go for it shaunt - but get it insured rite so if sumthin does go wrong ur covered man.
____________________
tinybikes

IanAl · Renault 5 Driver Joined: 05 Dec 2011 Karma :

I think the 125 engine drops straight into the 50cc frame. Have been considering it with my Senda. Everyone I have spoken to that has fitted the 70cc big bore jit have had their engine blow up shortly after.
I have a lovely rebuilt 50cc engine that I'm open to offers on, new main bearings and seals, new piston, rings, little end bearing, water pump, head gasket, plug etc
____________________
“It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood, who strives valiantly; who errs and comes short again and again; because there is not effort without error and shortcomings; but who does actually strive to do the deed; who knows the great enthusiasm, the great devotion, who spends himself in a worthy cause, who at the best knows in the end the triumph of high achievement and who at the worst, if he fails, at least he fails while daring greatly. So that his place shall never be with those cold and timid souls who know neither victory nor defeat.”