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Messages - Underdog1
16
« on: September 19, 2018, 10:05:20 AM »
17
« on: September 18, 2018, 05:52:29 PM »
Looking for a set of #115 jets for my 750k6, was recommended a while back that wemoto are a good place to get them but the websites search engine is terrible and I can’t seem to bring anything up..
Do they actually sell jets?
18
« on: September 15, 2018, 09:12:09 PM »
Love it well done bud! Let me know if ur ever riding it down south! I’ve not long completed my 550 brat/cafe which looks very similar!
Alan
I’m in the south west between taunton an Axminster, where abouts are you?
19
« on: September 15, 2018, 08:34:23 PM »
Well done you, it looks great and its a real credit to you. I know you have had plenty of agro and dramas along the way and I'm sure there will still be little problem that pop up and need sorting but that's old bikes for you. Enjoy.
Oh and make sure its totally legal and safe, Mr Plod just loves to pick on something a bit different !!!
Thanks Julie! Been a steep learning curve as I’ts my first time dabbling with engines and before I started this thread I don’t think I even owned a set of sockets.. I’ve now got a pretty well equipped workshop. Big thanks to you, Graham, Bryan and all the others who’ve given me help along the way, few last bits of tinkering and that should be his thread closed. Only took 2 years 
20
« on: September 15, 2018, 06:33:26 PM »
Seats fitted and took the bike out for a spin. Have also had a fiddle with and synced the carbs  I think it looks great and is just what I wanted. Bikes running alright still a little stumble at 3.5k but I’ve got another needle clip position to try in the future. The front sprocket oil seal is now doing its job since tapping it into place but will keep an eye on it, just getting some drips from one of thof oil hoses which I’ll look at getting repaired when I change the oil. Since replacing the washers on the fuel tap with dowty style ones as recommended by Bryan I’m not getting any more leakage through the petcock, I am however still getting overflowing carb bowls when the fuel tap is left on, just dribbles out. Have tested the brass overflow pipes for cracks and they’re all good, have swapped the replacement float valves with oem ones but still no joy. Pushing the floats up by hand stops the flow of fuel when the bowls are off
21
« on: September 14, 2018, 08:45:33 AM »
Seats got covered, upholsterer text me yesterday but not managed to pick it up yet 
22
« on: September 10, 2018, 09:20:58 PM »
Many thanks. I have ordered 360 x 19 and 410 x 18 TT100s from vintagetyres.com who were very helpful, and do a slight discount for a pair on ebay.
As I hoped, the modern TT100 has a more rounded profile than back in the '70s.
I’ve got a new tt100 3.60x19 in the for sale section, could have saved yourself some money (and I could have stopped tripping over a tyre in my utility!)
23
« on: September 09, 2018, 08:41:45 PM »
I feel your pain underdog  . I suffered a similar fate with my CB250RSA drive oil seal. It was fine for 10 miles and then just let go in the same way dumping oil all over the road. I had to split the cases to replace the seal. Hopefully yours will be OK, good luck.
Yeah time will tell, it’s a new seal so no idea why it’s happened. Do your air screws have springs ? They should not move 
Yeah they do, it’s possible I had a brain fart at some point but I’ll keep an eye on them to see if they move at all in the future
24
« on: September 09, 2018, 08:10:32 PM »
Okay so pulled the carbs off and raised the needle clips one notch to lean out the mix a bit, I’m at one clip from the top so still got some further adjustment if needed. Checked the floats and they are all bang on 26mm and operate smoothly. I’ve replaced the float valves with the original ones incase the cruzin image ones aren’t sealing properly. The aftermarket ones go into a point whilst the original ones are blunted off at the tip. I also noticed that the air mixture screws were no longer at the 1 turn out, on was at about 3 turns out.. no idea how these have worked themselves out but put them back to 1 turn. Got them back on the bike and synced with a carbtune pro which was pretty easy but then noticed I had a significant leak around the front sprocket cover. Whipped the sprocket off and seen this  The drive seal wasn’t sitting flat as it should and was leaking at the bottom where it protruded out slightly. Unsure whether it wasn’t lined up correctly when I closed the cases or not but it’s not leaked for the first 50 miles until now. I even put a smear of hondabond on it as recommended in hondamans book so perhaps this held back the oil until now. Rightly or wrongly I carefully tapped it back in flush and it doesn’t seem to leak any more. Am unable to ride as the seats with the upholsterer but fingers crossed it’s fine Still getting a bit out the overflows so don’t think swapping the float valves has done anything. I’ve not got any sort of washer beneath the float valve seat and carb body, none was supplied in the rebuild kit and none were on it when I stripped them.. have seen in some pictures that some sort of washer is present - did this appear on certain years only or am I missing them possibly?
25
« on: September 09, 2018, 09:04:43 AM »
Finally going to have some fettling time today so going to sort the petcock and carbs.
Running on the rich side so need to raise the needle clip either 1 or 2 notches. How long do I need to run the bike for before looking at plug colour again to see if I need to move needle position again? And do I need to clean up the plugs if they’re already a bit blackened from rich running or does this get burnt off?
26
« on: September 05, 2018, 07:49:25 PM »
With hravity feed from tank and engine off float needles have to be perfect to stop flow. With screws sealed you should not get more leakink and floats will seal enough for normal running as long as you remember to turn off when stopping engine. I think this was one of the reasons vac taps became more common
Yeah will investigate further this weekend, have ordered a few of those dowty washers you mentioned, will hopefully have some luck. The seats at the upholsterers so can’t ride anyway
27
« on: September 04, 2018, 05:05:16 PM »
There is your problem as they should be thick fibre washers that you can not get genericaly. I have used 6mm "Dowty" style washers with some success. If a total seal does not happen fuel leaks down past the bolt threads and bypasses the tap flooding the float bowls
Aha nice that would explain part of it, but the bowls overflowing is a separate issue I think UPDATE: just under £14 to have 2 delivered from DS..
28
« on: September 03, 2018, 06:46:28 PM »
If it is leaking with the tap turned off either the tap sealing disc is duff or you did not fit the proper washers under the heads of the retaing bolts
I just usescooper washers - didn’t look like anything special when I replaced them
29
« on: September 02, 2018, 06:41:53 PM »
Take the float bowl off and secure it level, fill with fuel and see if it drops then.
You can get the internal brass "standpipe" tube cracked and it let's the fuel leak out even without breaching the float/fuel level.
Check each in turn to find any errors.
Just to clarify you mean fill up the carb bowl when they are off the bike?
30
« on: September 02, 2018, 05:21:15 PM »
So thankfully it seems it’s the washer on the oil tank drain bolt leaking rather than the oil hose, I’ll replace the washer at some point and see if it makes a difference.
The seats currently with a local upholsterer getting sorted, have received a Morgan carbtune pro so I’ll hopefully have the carbs dialled in soon (unable to work on it this weekend though).
The carbs are still dumping fuel seemingly randomly. I’ll put the bike away and switch the fuel off, tinker around with a few things and still no fuel dumped.. but when I come back into the garage the next day there will be fuel ok the floor. Sometimes it doesn’t happen for a few days and all of a sudden it justs dumps the fuel whilst sat doing nothing...
They floats seem ok, if they were at incorrect heights or whatever surely it would just overflow straight away?
I’ve had this recently on my 500. At first I thought I left the fuel tap on, but realised that the fibre washers in the petcock housing had failed and were leaking fuel through the tap down into the carbs. They would then overflow onto the garage floor.
Quick test is to lift the fuel tank, and place it on a flat surface with a tray under the petcock. If the petcock is switched off but fuel starts gathering in the tray, there’s the source of the problem.
Hope this helps.
Sent from my iPhone using Tapatalk
Thanks for the advice but as this has happened with a remote fuel tank too I don’t think it’s petcock related
Well the bike has been standing a week and it still looks like fresh fuel is coming out the overflows despite petcock being switched off also one or two of the overflow tubes themselves are falling apart at the ends.. is this ethanol related? 
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