sr125shell

I`d get a cheap multimeter first & a decent trickle charger (for motorbikes not cars) - both will be useful forever, not just this job - so well worth the money!. Charge the battery & take a reading - about 12.7v fully charged should be correct. If the bike starts then we need to know if it holds a charge & that the reg/rec is working properly (there`s a simple test that can be done to test the rectifier - get a haynes manual). This is where I`d start

HI, I wouldn`t rule out anything to start with. Get hold of a multimeter to check the voltage on the battery (they are only cheap + are great for diagnosing loads of problems). I had to bump my SR125 for a while & it was due to battery & regulator/rectifier knackered. Does the electric start sound like an old doorbell buzzer after a few attempts?

Hi, well done with the engine swap . The wire attachment is for the carb heater - not available on earlier sr125`s (pre `97 I think). Glad to be of help with the puller. Cheers, Shell.

No Problem!

The tensioner blade is behind the flywheel - the 2 bolts that retain it - that`s what had ripped in two & needed replacing.

I reckon about £650 Dan maybe £695 at a push

was exactly like this one on ebay - item number 250186074942 - hope it helps

I got a 6-in-1 puller from Ebay for about £15 - asked the guy first though whether it had 16mm or not - worked no problem! Plus I have the other 5 sizes if needed in the future

I used a 16mm to remove mine

HI, my cam chain tensioner blade was basically ripped in two somehow + the throttle cable looked a little damaged- I`m guessing the previous owner had over-tightened it (they are automatically tensioned from 1997 I believe so don`t need adjustment). I did all the work myself & spent quite a few quid on tools such as flywheel remover, impact wrench, strap wrench, impact sockets, torque wrench, good spanner set & a Haynes manual. It took me quite a while as it was my first attempt at taking an engine apart, cost a bit in parts (£26 cam tensioner blade, about £20 in gaskets for cylinder head, barrel & generator + £16 for a throttle cable) but as the garage wanted £150 just to fit the blade I thought sod that! plus I cleaned up piston & rings etc & everything else I had access to. I very carefully put it all back together. Bike is running fine at the moment so I must`ve done something right! Get yourself a Haynes manual for starters Angela

Haynes manual says; when engine cold; Inlet = 0.05 - 0.09mm (0.002 - 0.003 in) exhaust = 0.11 - 0.15mm (0.004 - 0.006in) hope info helps!

Thanks Jinxed - feel I should have your username I will check everything asap that you mentioned although I did check with/without air filter & it made no difference at all, rubbers look fine. I`ll have more time to get stuck in at the weekend & will report everything I do/find. I got my compression tester here; http://www.amazon.co.uk/Draper-37442-Compr...8164&sr=8-1 In the description it says it goes upto 30 psi - that should read 300. I also needed the adaptor here; http://www.amazon.co.uk/Draper-YDCT1-COMPR...8164&sr=8-3 the adaptor will come via royal mail who are now on strike for the week I have the pdf user manual for the sr125 - what email address do you want me to send it to? cheers Michelle

Thanks for the reply Fosdyke, I`ve not had the bike long & it`s basically been a non-runner - literally done about 2 miles! I checked the operation of the throttle slide within the carb & it appears fine & snaps back nicely when releasing the throttle, doesn`t raise the throttle slide if you turn the handlebars which someone recommended I check. I actually got my hands on a spare carb & it behaves exactly the same so I reckon the problem lies elsewhere? . It`s hard to tell the exact colour of the smoke, I`d say it was white/grey & it`s it consistent rather than big puffs. I`ll do a compression test asap, the tester I bought didn`t have a correct sized adaptor which I`ve sent off for now. many thanks for the help Michelle

Thanks for the reply Drewpy, I`ll do a compression test as soon as the adaptor comes for my compression tester for motorbike spark plug sockets. I`ll check my Haynes for info on valve guides/seals. I forgot to mention that the year of the bike is 2003 & it`s only done 3000 miles - all done by the previous owner! Is that too soon to expect things to be wearing out? Michelle

Hi, my SR125 is giving me a headache. It won`t start correctly. Basically the only way I can get it to start without throttle is to fully turn the throttle stop screw adjuster all the way in (basically the same as giving throttle) but this leads to crazily high idle speeds & once I adjust the idle speed back to normal if I try to use the throttle it hangs at high revs for several seconds before attempting to idle properly again & the engine will eventually die + not restart without going through the whole procedure again. The choke doesn`t help starting at all. Noticed white smoke from the exhaust also, but could just be condensation? Carbs have been cleaned & floats, fuel mixture screw etc checked & set at correct heights. Spark plug was carbon coated when I checked it (running rich?) Air & fuel filters checked. Throttle cable checked. Any help with this is greatly appreciated Thanks Michelle