1st gear issues

[sutty86]

sorted the bearing out but i have noticed the bike get increasingly slower in first gear now the point cyclists are doing me until i build enough to go into 2nd,
i know its a 125 but this is a problem, literally taking 10 seconds to get over 10mph, all over gears are fine , top speed is fine(70).
tightened the chain today didnt affect the problem,
anyone experience this before

no increase of power with revs also could be 6000 or 11000 still the same output

bike is derbi terra 125

[sutty86]

just checked air filter,spark plug
all good air filter has just been changed also, but of creamy oil in there but thats normal....

i can sit on the bike and hold first with my feet whilst pulling clutch out in the highest revs, its not very strong pulling power....

if you get what i mean

could it be a clutch problem?

[NJD]

[Vincent]

Clutch slipping?
Are you saying that the revs go up but the bike doesn't speed up at the same rate?
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Space Is Deep

[Pete.]

[sutty86]

yes increasing revs and no increase in power in first gear...

yes im new to bikes but i have been riding since feb and this is a deffiante issue.... ive tried kicking straight into second but its just as slow to build up..

is it a case of new plates or could i play with adjusting the wire.

[sutty86]

ive read somewhere for a test to check to see if the clutch as slipped
is sit on your bike, foot hard down on the rear brake, pull clutch in, put into second give it some revs and release clutch if it stalls the clutch is healthy if not and it keeps on going its bad... mine in this case didnt stall....
FML

[NJD]

Clutch has little to no freeplay, adjust it.

Worth looking at the arm on the top of the engine case when you pull the clutch in make sure it engages and pulls forward and then when you release the clutch it disengages and goes back to its natural position.. just to ensure it isn't sticking.

[unitynotsocri...]

Mmm it seems you should check clutch cable adjustment. It sounds like you may have a wrong clutcvh cable or knacked plates.....

Since the words two stroke and 125 were mentioned then the plates have a high statistical probability of being worn out.
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nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS

[sutty86]

Its a four stroke buddy.

Would I just have to replace plates or the whole clutch assembly as its only affecting one gear.

[unitynotsocri...]

Oh dear...gettin older every day!!!!

Gettin em mixed up with fragile sporty two strokes.....mixing up my posts.

If I get worse I ll have to retire with a three speed bsa bantam !

Soz.....

Either way its the opposite of a cg ,an exotic performance 125= clutch wear.

Cg s don't have these problems as they are limited to three nn happence horsepower..I keep forgetting that there's a great handling 125 four stroke with a meaty engine that's not made of recycled enamel cups.......



Just replace the plates......assuming the central clutch shaft bearing is OK. You could also check the edge slots on the clutch basket which holds the clutch plates .....any tiny burs can be fine sanded \ filed out.
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nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS

[sutty86]

Thanks gents for all your help going to have a look at cable and the.manual see if that helps.
I reckon it will be a plates as its been getting progressively worse the past few months,
When I bought the bike I said it had slow acceleration but its now to the point its bloody dangerous.
Bike is a cracking bike but I need to sell to fund DAS