Some previous work undertaken by those well know mechanics Bodgit and Scarper!Originally Posted by Badger-Roy
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Some previous work undertaken by those well know mechanics Bodgit and Scarper!
Ah, but the old stuff can be so simple. I was on the old Ajay leading a White Horses run years ago and she started loosing power - and when you only have 16 bhp to start with,,, Anyway, limped on a couple of miles and she was sounding really odd too so stopped in a layby to check her over. Nothing obvious so restart her and then noticed the barrel was going up & down a bit with the piston! Ah, that'll be it then! My OH whipped out an adjustable, tightened everything up and away we went again to do the remaining 40 miles of the run.
No problem.
Woohoo weyhay the Bergman passed with “almost” flying colours, 1 advisory for ball-end missing on front brake lever and another for slightly rusty frame but not affecting the structure integrity.
I took it out for a celebratory ride (I actually genuinely had to collect a prescription for my bruv from Salisbury hospital as he’s in the sub 1% vulnerable group) and it actually rides really nice and rides and cruises at 80+ no problem, then I stopped for a quick vape and it started no problem but as soon as I touched the throttle the engine bogs and died.
Would I be correct in saying this is probably a stuck float or a blocked pilot jet?
Anyway did I mention I had to push the bloody thing better part of a mile home, and a mile pushing a 400cc is a damn long way for a fat bloke with short legs!
Well done about the MOT, shame about the push though
Could also be leak somewhere around the inlet manifold or dodgy autochoke (if it has one). I'd check them before the carb just because they are easier and you'll be removing them enroute to the carb anyways.
What I can’t work out was it was riding really well up in till I pulled over and turned the engine off for 5 mins, from that point on it’s been an absolute turd, it’ll tick over happy as Larry all day (I hope Larrys happy anyway he’s not been on for a while) but literally as soon as I touch the throttle it bogs down and stalls.
If it has an auto choke deffo try pulling it first (if it has one it'll usually be on the side of the carb with a couple wires coming from it). That old V-clic I modified alot had one and it left my Mrs stranded in Amesbury once with identical symptoms. Testing the inlet manifold is easy too shoot loads of WD40 at it while bike is running, if the idle speed changes there is an issue. Any of those or dirt blocking the carb can just happen..... if it sat for ages could be old sediment and **** in the tank and just bad luck it shifted and caused a blockage when you stopped.
Chicky had expressed a wish to learn more about bikes and mechanics and last September I returned from the Classic Bol d'Or to find that she'd relieved my sister of several boxes of rust that had previously been a little Yamaha RS100 that my sis had found half-submerged in somebody's garden - it had been there since the end of the '80s and was biodegrading and literally becoming part of the scenery, and the householder gave it to my sis. Chicky paid her £50 for the lot, fair enough as my sis had stripped it right down and already bought a new piston and rings, and a few other bits that obviously needed replacing - the tinware was pretty much shot as were the wheels and swingarm. In January we'd done a fair bit of prep work and I'd tidied the engine cases, barrel and head, and reassembled it with the new piston and rings. We visited the Kempton Park auto jumble a couple of times looking for forks and wheels but the RS hasn't (yet) attained popular status so we never found anything useful. Upon leaving Kempton for the 2nd time we decided to try elsewhere and a post on the RS owners Facebook page elicited a quick response - a guy in North London had wheels and forks for sale (he was "upgrading" his RS to use YBR125 parts, something that I'd considered doing with ours to be honest) so we scooted round the M25 a bit and struck a deal - and stopped at the Ace café for a cuppa afterwards.
We decided to park the RS project for a while as we're a bit tight for space in the garage and there were other more pressing jobs to be done, among them being selling two of the collection. Then came along the Coronavirus and lockdown and we haven't even bothered advertising the bikes yet, but with a bit of time on my hands I've dug out the RS and resumed work. Frame and swingarm have been painted, and a load of bits previously identified as needed ordered from Wemoto and Fowlups. Next job I reckon will be to tidy up the fork stanchions before the just-ordered seals and fork oil arrive - Jaydee suggested filling the pits with zinc paint and then rubbing down with very fine grade wet & dry - gotta be worth a try, and if that doesn't work, new fork stanchions are only £29.52 from Wemoto. EBay will be consulted for a pair of shocks too, as the originals are toast and any potential replacements spotted at Kempton would no doubt have had heavier springs on them as the only known correct feature was the centre mounting distances.
More soon....
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