de-restricting shit bikes

jon · Guest

don't laugh but, is it possible to de-restrict a CG125? just to get a few more mph out of it??

minesweeper · Whoah there! Joined: 03 Feb 2002 Karma :

Not sure if they even bothered to restrict those things Smile

is the exhaust even big enough to fit a restrictor......

sorry for not being helpful one of the intelligent forum members will answer later Rolling Eyes

matt

Jon W. · Two Stroke Sniffer Joined: 19 Apr 2002 Karma :

i was looking at an SR125 and noticed it had a restrictor in the pipe, im not sure about the CG but its just that i'm getting one of these so i'd like to be able to do this

zaknafien · Joined: 25 Mar 2002 Karma :

i wouldnt know about derestriction but for info a CG's exhaust is quite large
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02 Firestorm.

G · The Voice of Reason Joined: 02 Feb 2002 Karma :

AFAIK cg's aren't restricted. You can probably tune them a bit, but I dob't it'd be worth it.

btw. allthough the actual exhaust is quite large the internal diameter is small (at the exit at least)

Keen · World Chat Champion Joined: 03 Apr 2002 Karma :

Yeah g's right they only make 11bhp or something as a maximum with them being 4 strokes, I looked into them when I was deciding what bike to get. Don't bother with them if you want something with any go.

G · The Voice of Reason Joined: 02 Feb 2002 Karma :

newer 4 strokes can make around the 15hp limit... but the cg design is around 20 years old... easy & simple maintence though.

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

G · The Voice of Reason Joined: 02 Feb 2002 Karma :

sorry meant the cg engine not the general design; my boss was about to come and talk to me so I wanted to close IE quickly...
Admittadley I'm not sure when the cg was first introduced and if the engine was used before the cg.

Jon W. · Two Stroke Sniffer Joined: 19 Apr 2002 Karma :

ok, thanks for your replys anyway. + I only want the CG because everything is cheap to do with it and I only need it for a year to get to and from uni!
(when i hit 21 i'll get my 600 hornet on the road)

Doddmaster · World Chat Champion Joined: 02 Feb 2002 Karma :

What was the CG engine in before then? I thought CB125s were twins.

Stevo · Guest

The CG aint restricted as such, but is just an 11bhp cooking engine. Keiths right about more sporty hondas using an OHC motor. They did do a CB125 single as well as the twin which had 13bhp@10k. The XL125 trail bike also used the OHC version, and in fact the bottom end of the CG and CB motors looks very much the same. I dunno if it might be possible to fit the OHC top end to the CG bottom end, but it wouldent suprise me. As for power well you aint gonna get much from a simple 4s single, but the key to getting extra power is in the Cylinder head. If you have it gas flowed and ported, and skim the head face to increase the CR then you might gain an extra couple of hp. Also you could use the cam from a honda dirt bike motor that has more lift, as does the CB cam i think. My m8 needs a new silencer for his CG, but he aint so keen on my idea that we saw off the knackered one, and fit a nice magaphone for that real race bike sound.

zaknafien · Joined: 25 Mar 2002 Karma :

A CG is a workhorse anyway if the thing did go fast you come off it pretty quick as it's crap on corners and stuff.
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02 Firestorm.

Stevo · Guest

Actually i reckon that for what it is the CG handles pretty well, and the small tyres give nice quick steering, and it can be leaned over quite a bit before the pegs scrape. The only part of the chassis that is near the limit of its performance is the brakes, and if it were any quicker it would probably need a disc on the front. For a cheap ride to work/college bike that you can thrash everywhere and is easy on maintainence then its hard to beat. Bikes like AR125's or RG125's are much quicker but probably less reliable and wont tolerate neglect like a CG will.

G · The Voice of Reason Joined: 02 Feb 2002 Karma :

I'd agree with Steveo, the handlings not too bad though the braking is pretty poor. They're nice little bike though best kept to town/local use.
When the pegs scrape it's a bit worring though, as they're rubber coated... they bounce the bike back up, which worried me the first time it happend Smile

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zaknafien · Joined: 25 Mar 2002 Karma :

i'd disagree with both i found the handling absolutely dire that bleh thats just me and yeah the braking is crap those drum brakes just dont cut it anymore.
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02 Firestorm.

Scooby · Scrappy Doo Joined: 26 Mar 2002 Karma :

hehe zaknafien.....it ain't the CG's crap handling, it's just that the NSR's is loads better....
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zaknafien · Joined: 25 Mar 2002 Karma :

nah i hated the CG's from the minute i test rode my m8's DTR i just never liked it
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02 Firestorm.

James · Spanner Monkey Joined: 25 Feb 2002 Karma :

I cant fault CG's. I had one as a step up from a C90 when i was 11. Y'know just for bombing round the fields. I had it a year, gave it more abuse than the Leeds fans do David Beckham and it never once broke down or cut out.
Cant knock it as an old thumper
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