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Post by george on Jan 31, 2009 20:31:09 GMT 1
i have a 125 lc mk2 which doesnt seem to have much power untill about 7000 revs is this just normal or is there anythin i can do? cheers
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Post by guiri on Jan 31, 2009 20:55:52 GMT 1
normal. standard exhaust gives more bottom end less top.if air box missing bad 4 bottom end power as well!!!!
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Post by Norbo on Feb 4, 2009 19:16:12 GMT 1
As guiri said . Sounds like you have a expanshon chamber on they do that to the power. and even more with a filter on .
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Post by tzrman1984 on Feb 6, 2009 18:21:13 GMT 1
why botherd about bottom end ?, its all about the top end on a 2t , you want bottom end mate buy yourself a honda cg lol , on a serious note would it not be possible to git a servo ? (im going from tzr barrels here ) i seem to rember the mk3 lc has the servo possibley swap barrles if you wanted a bit more grunt
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Post by justinglos on Feb 6, 2009 18:38:38 GMT 1
you can t stick a mk3 barrel on a mk 2 unless you change the con rod mk 3 con rod is longer
wot air filter you got on and exhaust pipe are the reeds ok ?
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Post by tzrman1984 on Feb 6, 2009 19:57:14 GMT 1
ah fair play ( mate i saee your from gloucester/cheltham area ) small world moved dwon from glocuester just over 10 years ago with parents , me old man now lives back in checltham right by the dual carge way we will have to meet for a rode sometime once me bikes built and im down that way
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Post by justinglos on Feb 8, 2009 20:12:12 GMT 1
yer no prob just in the middle of spaying mine got a mk3 ypvs
live down by kingsdicth in cheltenham
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Post by tzrman1984 on Feb 9, 2009 11:54:49 GMT 1
actaully i gloucester at the moment , unfourney it wasnt planned my grandad was rushed into gloucester royal hospital yesterday morning , so.. luckly hes come round (had heart faluire ) and hes commucting etc so thats good , my rs/tzr project bike will hopefully be finshed soon jsut waiting on parts
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Post by twostroker on Feb 9, 2009 21:15:00 GMT 1
actaully i gloucester at the moment , unfourney it wasnt planned my grandad was rushed into gloucester royal hospital yesterday morning , so.. luckly hes come round (had heart faluire ) and hes commucting etc so thats good , my rs/tzr project bike will hopefully be finshed soon jsut waiting on parts any pics of your bike so far? |
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Post by mogster on Feb 9, 2009 22:17:58 GMT 1
Flat Bottom end !!!!!!!!! It's a 125cc 12hp or 21hp hardly going to be anything else ......
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Post by tzrman1984 on Feb 10, 2009 21:55:07 GMT 1
actaully i gloucester at the moment , unfourney it wasnt planned my grandad was rushed into gloucester royal hospital yesterday morning , so.. luckly hes come round (had heart faluire ) and hes commucting etc so thats good , my rs/tzr project bike will hopefully be finshed soon jsut waiting on parts any pics of your bike so far? jsut waiting on parts mate , i have the frame sat i my shed right now beeing striped down to alloy , so when bits arrive (been told thursday ) will get a thread started on here for you boyos |
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Post by twostroker on Feb 11, 2009 23:06:28 GMT 1
my 125lc runs a 175cc top end with a load of other mods,its exactly like jazzy says below 7k revs it feels like a 50cc moped then suddenly as it hits 7k it pulls like mad,not realy ideal but its good fun lol
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Post by tzrman1984 on Feb 12, 2009 22:48:01 GMT 1
Clutch abuse ftw its what separtes the boys from the men ! oh and and im still bloddy waiting for my bits to come , hope there here tommorw , as i wanna start moutning the engine at the weekeknd
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Post by racerd on Feb 26, 2009 3:46:56 GMT 1
you can t stick a mk3 barrel on a mk 2 unless you change the con rod mk 3 con rod is longer wot air filter you got on and exhaust pipe are the reeds ok ? yes you can put a rdz top end onto a mk1/2 lc engine you don't need to change con rod, you add base gaskets to lift the barrel up so the bottom edge of the exhaust port lines up with the front edge of piston crown then turn over motor till at tdc see where the piston comes to then scribe the bore and get that much skimmed off rdz top end on a mk1 lc engine  |
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Post by racerd on Feb 26, 2009 3:51:21 GMT 1
Flat Bottom end !!!!!!!!! It's a 125cc 12hp or 21hp hardly going to be anything else ...... yeah its not just yours they are all the same lol, even worse with allspeed or micron on, if its like mine was its like a 50 cc below 7k then off like a rocket when it hits the power?? ALL OR NOTHING there is a way round it as most 2 stroke riders will tell you, its called clutch abuse lol and all you need to do is dip the clutch till the revs hit the 7k mark and off we go its easy ;D ;D ;D ;D with a micron if it is the short end can one then clutch slip needed to get in the power band but if you use a long end can this gives more mid range and top end = more bleed down time no clutch slip needed remember end can is part of the total length of the pipe |
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Post by racerd on Feb 26, 2009 3:57:58 GMT 1
tuning/ carbs/reeds/reed block/ open out reed stops/ spacer tube/ram air filter/ exhausts/ set the squish 0.96mm / porting/air corrector kit/ flat and polish piston crown, combustion chamber, exhaust port/plugs/ decent 2 stroke oil/tzr piston kit with modded inlet side of the piston/ also the main oil feed ways for main bearings need opening out, my lc pulls from 3,000 rpm to 6,000 rpm then from 7/7,500 rpm to 11,000 rpm
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Post by mellow on Feb 26, 2009 22:29:40 GMT 1
 ;D
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Post by racerd on Feb 26, 2009 23:23:06 GMT 1
with a micron if it is the short end can one then clutch slip needed to get in the power band but if you use a long end can this gives more mid range and top end = more bleed down time no clutch slip needed remember end can is part of the total length of the pipe my micron had the longer end can and it still needed a good handfull?? guess i must have been doing something wrong??? well other than being the only 125 rider out with 600;s n 1000cc boys hehe well you gotta try lol what set up was on your lc |
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;D