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Mat Oxley 1986 IOM TT


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Messages - mewherman

#1
Turning Wrenches / Re: Spark plug fouling
July 23, 2023, 05:59:16 PM
Hey, I haven't been on this site in a while. I just wanted to say that I replaced all the OEM ignition parts with new parts from Economy cycle and the bike hasn't fouled any plugs since that time, although I honestly have not ridden it much.

It occasionally will have a very hard time starting after sitting for any length of time, it seems to fill the crankcase with oil, and you have to kick it and clean the plugs and kick it etc for ages until it fires up.

I rode it today after getting it going, Theoretically it should do 100mph I think, but the performance is a little sub par, I only got like 85-90 out of it. No idea how accurate the speedo is. The seat of the pants feels like it's a little sluggish compared to my rd350.

I rebuilt this engine and it has very few miles on it. it's an r5 with six speed and the cylinders were ported by someone when I got them. This may affect performance if it was done improperly, as I had no way to judge if they were ported well or not.   
#2
Haus of Projects / Re: 1971 R5 not a restoration
October 21, 2021, 09:06:43 PM
Quote from: Czakky on October 19, 2021, 05:01:19 AM
Did you adjust the linkage at the pushrod? I forget what it is, tighten then back off an 1/8th...?

Are you running the oil pump? I've never had any fouling issues... weird it being so close to stock.

Yes, at the push rod, I backed it off a bit, and now it seems to grab fine. I'm not sure what the spec is supposed to be I can't find anything about that.

I am running the pump which seems to operate fine, I replaced all the seals and lines on it.

I have no idea why it's doing this, I think I need to replace all the old original ignition stuff just to rule that out. The bike is basically stock other than a uni filter and the cylinders are ported. I really hope it isn't somehow an issue with the port work that's been done because that would mean I basically need to buy another set of replacement cylinders.
#3
Turning Wrenches / Spark plug fouling
October 21, 2021, 09:00:02 PM
So my r5 engine works great until it fouls it's plugs, the thing has eaten four sets of plugs now. Once they're fouled they're garbage and no amount of cleaning will bring them back to life for more than a few minutes. I rode the bike on the highway at 60-70 mph this evening with no issues. Got home, looked at the plugs, and they're kinda oily and have a black electrode but not the plugs isn't totally black or anything. I put them back in, this is after a test ride where it didn't foul a plug and was still running fine, and it fouled the right side again, it seems to foul the right side over the left, it also will backfire through the carb and out the exhaust if it's beginning to fail.

Would this just be down to me needing to shotgun a new everything on the ignition system? I double-checked the timing and points gap and it's normal. I'm getting pretty tired of working on this bike, I thought I would finish the restoration and it would be fine with minor issues, not have 1000 problems. Everything in the ignition system is old/original. I was going to replace the points and condenser when I did the engine rebuild but economy cycle said they were out of stock on the parts and would send them when they were in stock, well that was three months ago, so I guess I need to buy points somewhere else.

With fresh plugs it starts up and runs strong and then seems to degrade quickly, it usually loses the right cylinder if you shut it off and then try and start it back up again after cooling down a bit. Although I have lost the left side as well and I have also lost while riding.

It's a little odd since I never had any ignition issues with the bike when it was on the road two years ago with its original engine. I've also only fouled one plug ever on one of these bikes prior to this. 
#4
Haus of Projects / Re: 1971 R5 not a restoration
October 19, 2021, 01:55:34 AM
Well that last test ride just now I felt the front end get light in third with the clutch still slipping. Not sure what the clutch's deal is, it worked fine in the rd250 it came out of but that 250 was totally clapped out, so maybe I just need new plates. I've adjusted the linkage so it's applying no pressure, so I'll try again. Performance of the engine is great, but It has fouled three sets of spark plugs. I think I just need to replace everything ignition related and try again, I have double-checked timing is dead on and the gap is perfect. It totally killed two brand new NGKS, even the blow torch wouldn't bring them back to life!
#5
Haus of Projects / Re: 1971 R5 not a restoration
October 17, 2021, 11:09:53 PM
Quote from: m in sc on October 17, 2021, 05:38:21 PM
i -suspect- mine has had something done as well, but not sure. try dropping the needle 1 if its fat, i doubt you were on the main for any length of time in the neighborhood (assuming its the same when fully warmed up).

I rode the bike for the first time this afternoon after putting plates on it and finishing a few odds and ends. I wasn't able to exactly determine if it's rich or lean really since the clutch was slipping, and I was having ignition issues and fouled plugs. The clutch used to slip unless it was adjusted all the way loose at the engine side when the engine was stock before as well, of course now it has a totally different clutch that I know is good, so I guess it wasn't that. I guess it just doesn't like any preload on that slot screw.

Despite these issues the bike feels pretty good and I can tell the engine has a lot more to give, and It was very fun to ride! I was having issues with the points, I had ordered replacements in the form of a tune up kit when I ordered all the parts from economy cycle but when the order was filled they said they were out of stock so I only got condensers. They said they would send the points when they got some, but it's been three months with no contact from them. So basically i'm running all 40 year old ignition parts lol.

When I put the bike together, I installed these snazzy looking new "classic" shocks I bought from economy cycle to replace the rusty originals, I'm finding they have no give at all and provide a very firm ride. I'm not sure what other people have experienced with these, maybe they are better suited to a much heavier rider than me.
#6
Haus of Projects / Re: 1971 R5 not a restoration
October 17, 2021, 12:52:41 PM
Quote from: m in sc on October 17, 2021, 10:51:18 AM
yup. sounds and looks great.

is it a k&n y boot? if so mine (otherwise stock 70) is same setup. seems to like 140 mains.  :twocents:

I have a uni y boot, this also has port work of unknown quality or origin done to the cylinders. I put 130s in there, the original ones were like 110? Or something. I have only ridden it around the neighbourhood.
#7
Quote from: SoCal250 on October 17, 2021, 12:30:13 PM
If the fitting your are trying to source is a 90 degree press-in oil fitting with a barbed end, they are available. Don't know why you're having a hard time finding them. Although most dealers don't have them because it is a discontinued part.

According to my old parts book, the R5 & R5B used the press-in type nozzle fitting and the R5C used the banjo-bolt type.
Here are the two variants:
24        278-13552-02-00    NOZZLE (278-13552-01) 0 1
24-1     214-13162-01-00    BANJO, DLVRY PIPE

List of superseded parts for the Nozzle:
278-13552-00-00
278-13552-01-00
278-13552-02-00
3XV-13741-00-00

Quite a few on Ebay currently
https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313&_nkw=yamaha+278-13552&_sacat=0
https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313&_nkw=yamaha+3XV-13741&_sacat=0

Speed & Sport in PA has more than 50pcs in stock
Part #                      Description                    On Hand   Price
278-13552-02-00   3XV-13741-00-00 NOZZLE     20       $28.55
278-13552-01-00   278-13552-02-00 NOZZLE       4       $28.55
3XV-13741-00-00   NOZZLE                                31       $18.49

Oh I have ordered an NOS one on ebay, I just meant it wasn't available on Economy cycle or other similar sites, I was also using the wrong search terms because I didn't know it was a "nozzle". Thanks for all the information!
#8
Haus of Projects / Re: 1971 R5 not a restoration
October 17, 2021, 04:27:20 AM
Started the bike up and road it for the first time, transmission and clutch issues seem to be cured. Runs a bit rich, I probably should have just left the stock mains in there.

https://youtu.be/3tIhKyp8lDU
#9
Quote from: m in sc on October 10, 2021, 02:29:37 PM
Quote from: mewherman on October 09, 2021, 10:54:09 PM
Hey, thanks everyone for their help. I worked on the bike tonight, assembling the transmission component by component logically to determine the cause. I ended up finding that I had accidentally mixed up the tin shift drum collar (i'm not sure what else to call it) from the R5, the RD collar is very slightly larger and this was causing the shift drum to drag and not slide into the next gear. I've reassembled the engine, and it shifts through all the gears.

I haven't been able to run the engine yet, as I managed to snap the barb off one of the oil injection fittings on the cylinders, this is causing me major issues as I cannot find a replacement fitting online. The fitting is not the usual banjo style, it is one piece and pressed into the intake. I am only able to find the banjo fittings.

im pretty sure the cyl fitting is the same as the outlet one on the oil pump . ;)

side note.. makes sense on the drum. good catch.

Just fyi, I removed a fitting from the oil pump and they are not the same.
#10
I have an original 1960s super cub, it's very slow and unreliable. Would love a new cub with the fuel injection and abs but they don't sell them here. Shame.
#11
Quote from: m in sc on October 10, 2021, 02:29:37 PM
Quote from: mewherman on October 09, 2021, 10:54:09 PM
Hey, thanks everyone for their help. I worked on the bike tonight, assembling the transmission component by component logically to determine the cause. I ended up finding that I had accidentally mixed up the tin shift drum collar (i'm not sure what else to call it) from the R5, the RD collar is very slightly larger and this was causing the shift drum to drag and not slide into the next gear. I've reassembled the engine, and it shifts through all the gears.

I haven't been able to run the engine yet, as I managed to snap the barb off one of the oil injection fittings on the cylinders, this is causing me major issues as I cannot find a replacement fitting online. The fitting is not the usual banjo style, it is one piece and pressed into the intake. I am only able to find the banjo fittings.

im pretty sure the cyl fitting is the same as the outlet one on the oil pump . ;)

side note.. makes sense on the drum. good catch.

Quote from: 1976RD400C on October 10, 2021, 02:21:29 PM
Quote from: mewherman on October 10, 2021, 01:33:20 PM
I can't even find a picture of these fittings, they are brass 90 degrees and are pressed into the location where the banjo fittings would normally go on the r5.

This? Part 24   Looks like it is available.   https://www.yamahapartsmonster.com/oemparts/a/yam/50041640f8700209bc7846d0/oiil-pump

Quote from: 1976RD400C on October 10, 2021, 02:41:04 PM
https://www.ebay.com/itm/203020611803

Managed to get one of the fittings NOS on eBay yesterday. Does anyone know why my old cylinders had the banjo style and these replacements had this type fitting? Is it a year thing?

Now that you mentioned that I actually have an old RD250 oil pump in my parts stash I should see if I can rob the fitting out of it, this fitting is the only thing stopping me from going for a ride.
#12
Quote from: rodneya on October 10, 2021, 01:36:07 AM
The oil injection fittings are hard to find at the moment.
There is a guy  on the Yamaha RD Air Cooled facebook group  who is 3d printing them. Name is Steve Burgess

I can't even find a picture of these fittings, they are brass 90 degrees and are pressed into the location where the banjo fittings would normally go on the r5.
#13
Haus of Projects / Re: 1971 R5 not a restoration
October 09, 2021, 11:05:09 PM
Quote from: Czakky on October 07, 2021, 07:38:23 AM
Wish I could help with the transmission...

Your paint looks amazing!

What seat is that?

Thank you!, I actually have sorted the transmission out, I believe. I would be riding it if I hadn't broken an oil injector fitting and now am unable to find a replacement.  Yes it's a texavina seat https://texavina.com/1970-1972-yamaha-rd350-r5-ds7-solo-cafe-racer-sport-motorcycle-seat-sku-t2080/ Seems to be well made and fits well with the correct hardware. I would say I'm happy with it but it had better be good at the price I paid.
#14
Haus of Projects / Re: 1971 R5 not a restoration
October 09, 2021, 11:01:55 PM
Quote from: sav0r on July 14, 2021, 09:30:44 AM
The best part about powder coat is that you can assemble the thing without worrying about chipping paint. I love it.

Also, that Vo in the background. Loving that!

Haha, yeah, it's a 1976 wagon. It's pretty rough, but has been really reliable for a 45-year-old unrestored survivor. 
#15
Hey, thanks everyone for their help. I worked on the bike tonight, assembling the transmission component by component logically to determine the cause. I ended up finding that I had accidentally mixed up the tin shift drum collar (i'm not sure what else to call it) from the R5, the RD collar is very slightly larger and this was causing the shift drum to drag and not slide into the next gear. I've reassembled the engine, and it shifts through all the gears.

I haven't been able to run the engine yet, as I managed to snap the barb off one of the oil injection fittings on the cylinders, this is causing me major issues as I cannot find a replacement fitting online. The fitting is not the usual banjo style, it is one piece and pressed into the intake. I am only able to find the banjo fittings.