Stu
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Well. Update time after a productive weekend!
- 520 kit fitted. Front and rear sprocket and 520 chain. Little more top speed, but significantly better gearing. Fun and games fitting though. Son lifted the rear (the gym membership I pay for came in useful at last!) and axles stands on either side of the swing arm. Sturdy enough to take the wheel off. Rear sprocket removed and replaced with uprated one from kit. Bolts tightened to torque specs. Few questions. Does this impact speedo reading at all seeing as both sprockets are now larger? From other posts the original speedo readings are a little off, so perhaps makes the reading more accurate now? Also noticed there was no rubber donut thing in the rear wheel behind sprocket. Should there be one and if so anyone have any idea where I can get one from?
- Engine casing bolts swapped out and torqued to as per Marcel’s guidance. Small bit of bling, but also more reliable (a bunch of the original bolts had rusty heads, some with pitted shafts and not in great condition so better to be safe than sorry).
Been out for a 60 min ride and the 520 kit makes it much more rideable, and together with NGK’s (from Hyoriders shop) a noticeable improvement from when I bought it. All in all well worth it. Never going to be a super speed monster with only 125cc, but going to look at ways to increase low and mid range torque. Think clutch plates are on the hit list in a short while which should help overall.
Waiting on bobbins (from the hyoriders shop), and new paddock stands front and back (motorcycle parts warehouse). Both will hopefully make things easier for maintenance.
Loving the big little bike still, even more now I’ve gotten oil under my nails! Have tools, will use them!!
Check out the photos, including my axle stand workaround!
Got pics of the rusted intake clamp, but can’t upload? Option to add photo from my phone disappeared.
marcel – will do you them.There may be one other mod. Pretty sure the EGR has been blanked but will check and take photos and post tomorrow.
Good Easter thanks. Hope you had a good one too. Was definitely biking weather. Went out after the little service and love that other bikers give a little nod when you pass them on the road!
Anyhow, to business. Only mod I’m aware of is the full black widow stainless steel system straight through from cylinders. Air filter looks OEM (no branding visible) and not ventured to look at the jets yet. Bike was bought in Portsmouth and the exhaust at the same time so perhaps other mods from the outset but nothing i can find in the paperwork and last owner didn’t think so. I did think it was maybe running a little rich when starting as strong smell of petrol, half choke needed together with a twist of throttle (keeping revs low) to start, but didn’t know if that was normal?CR8’s from you have definitely made an improvement, although not any significant power increase the rideability has improved. Seems to be a little snappier on the throttle and its now idling a little lower when warm. Cold start also slightly improved, but need to turn her over a good few times before she fires. Really want to get the carb off and cleaned, but worried about the clamp. Will get some decent photos posted of the offending rusted clamps tomorrow if it helps. Any advice on removal would be greatly appreciated. Totally don’t want to end up breaking a part that’s hard to replace like the intake manifolds.
I dropped her flat on the right side today (left the disks lock off when pulling out of a parking space and she’s heavy girl, Felt shame!). Nothing major and managed to hold it so it wasn’t a big whack. Bent the brake lever a little, but still well usable. There was a pool of petrol where she landed. Presuming from carbs as it was around that area and it did take much longer to start, after I‘d left it standing for 10 mins. Few questions about this. Would this petrol be from the carb? If it is should it be holding petrol once the engine’s killed? If its running rich is this overfuelling the carb and the reason why its holding petrol? Is it not the carb at all but from somewhere else (the tank as the petrol was sloshing when I dropped it)? Any idea where i can get a second hand lever (only)?
Was going to fudge together a bodged stand with a thick piece of wood and two axle stands under the frame, but the exhaust fouls up that idea, ands probably wasn’t a good idea from the start. Don’t have paddock stands at the moment, so will be investing in a set together with some bobbins from the shop when I get paid at the end of the month. Probably the oil plugs and filler bolts as well.
Compression tester is made by Roadster (?) and was £20 on line, with an additional bike adaptor i had to buy separate as photo. Might be able to speak with a car mechanic (friend of a friend) see if he can compression test or lend me his tester. What would be good/expected compression front and back? Are my readings way off?
Thanks for the advice on bolts. Thought it would leak fluids in some places if I took them all off at the same time, but didn‘t know if I needed to drain oil again. 1 in 1 out approach is great and much easier. Smaller torque wrench on the shopping list now as the one I’ve bought is min 20nm.
Back spark (old) 
Well, I’ve now compression tested and changed sparks. Back cylinder is 4bar/55psi and front is 3.5bar/50psi (approx, and on the basis the tester isn’t screwed). Hoping this isn’t too bad? Oil filter and oil changed. Pics of used sparks attached. Unsure if anything can be determined from them? Running normal/rich/lean? (Back spark has bike in the background).Sump bolt seemed to have a lot of debris on the magnet (normal?), and oil was very dark.
Had a look at taking the air box off, but aside from being well fiddly to get at, the front jubilee is properly rusted up, presuming because unfaired. Any advice on getting this off without damaging the inlet manifolds?
Taken her out for a short spin and happy with improvements so far 😁
Engine bolt swap out tomorrow. Quick question, can I just swap these out 1 at a time?
Going to have to wait on chain and sprockets change, but can’t wait to get it on. Need bobbins and paddock stands as my workaround bike stand won’t work as my exhaust fouls the frame. Another order on the way soon to the shop as well as updates.
Thanks Marcell! Definitely some things for me to get on with! Been reading a load of posts here and on Facebook and glad you replied! Will take your advice and work through your points
Bike has some history, and bought off a copper so all legit and everything seems to be working (but noob so what do I really know!). Does have black widow end can and what looks to be stainless pipes through to manifold.
Will get some decent pics on soon and get the upgrades bought.
There is a mobile bike mechanic in my area so gonna give him a try, and I’ll be staying with him while he works (for my benefit mainly but also to keep an eye out). Spoken to a few places about servicing and swapping bits out and so far only one taker for servicing. Any Merseyside shops that you’d recommend?
Will definitely be posting updates on this!
Thanks again Marcell!
