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Message started by Tiktok423 on 03/04/15 at 16:02:05

Title: Loss of top end and other issues
Post by Tiktok423 on 03/04/15 at 16:02:05

Hey guys hoping you can help, I have been researching and will continue to but I thought I would ask anyway.
sorry for the novel.

so I changed my stock muffler for a HD Dyna, took a few attempts before I got it air tight, didnt re jet just left it as is, I also did a oil and oil filter change too.
I rode it to work the next day which is about 140km round trip, the bike ran great, I thought there was a little more get up and go at around 80kph but also noticed i wasn't getting the top speed that I usually get on my ride to work, it wasn't major maybe 5 - 10 kmph loss. but all in all it was a pretty successful ride. It was loud as a mofo tho, had to wear earplugs on the way home because i almost got a headache. I also felt like the clutch was slipping so when I got home i checked and the clutch lever wasnt set right so i adjusted it to where I think it looked and felt right.

Anyways., the next day I rode to work and all hell broke loose lol.
I couldnt get over 80k at one stage without it smoking up and surging and losing power going up the first hill, this continued the whole trip but in stages i worked it up to 110 - 120km so from 80k surging smoking and losing power to being sweet the next time i got up to 80km, then pushing it up to 90km and it doing the same, but coming right again, then the same thing at 100km, etc.

I thought it was a fuel problem, and i was blowing out the cobwebs in a way, anyway I made it to work, then when I went to ride home i notice a little puddle of petrol under the bike which looked like it came from the carb air vent maybe? I just soldiered on and tried to make it home. it had the same issues on the way home, completely turning off on me twice while on the motorway, the 2nd time it did it I switched to prime and all was going good, untill it shut down on me again and I realised i was out of petrol, got the wife to bring me some fuel and made it home eventually.

from what i have researched so far i think i need to re jet but is there anything else sinister going on that yous can pick up from my novel?

thanks in advance im in New Zealand so any suggestions on jet size etc.

I hope that explains enough ask questions if you need to.

Cheers

Title: Re: Loss of top end and other issues
Post by justin_o_guy2 on 03/04/15 at 16:19:52

My first thought is petcock..
Hunt around for threads on that.

Title: Re: Loss of top end and other issues
Post by Tiktok423 on 03/04/15 at 16:30:12

524D4B4C51566757675F4D410A380 wrote:

My first thought is petcock..
Hunt around for threads on that.

Thank you, it is something i thought about and now its something i will look into.

I forgot to mention that I have a bit of power but when the revs get up the bike just doesnt want to go any faster. I have to gradually work my way up to a speed and cant get there by pushing it, it just seems almost like at a certain rev it just stops getting anymore power so I have to lower the revs to get the speed up. climbing hills i cant have the revs up too much or it starts losing power. thanks

Title: Re: Loss of top end and other issues
Post by Serowbot on 03/04/15 at 17:14:09

If your HD muffler is loud as a MF'r... it has been drilled out, and is now basically a straight pipe...
You need some back pressure... find one that isn't boogerd up...
Then, all will be well...and you won't go deaf...

Title: Re: Loss of top end and other issues
Post by Tiktok423 on 03/04/15 at 18:21:45

4A5C4B564E5B564D390 wrote:

Thats great to hear, I do have another HD Dyna that I can try. so if it is in fact acting as a straight pipe, would that explain all of the symptoms ie, petrol leak, surging, loss of power etc.

thank you

Title: Re: Loss of top end and other issues
Post by verslagen1 on 03/04/15 at 18:52:22

in the dyna there's a plate that completely blocks the exhaust from going straight thru. if it's drilled or punched out completely it'll be loud.

you can push a freeze plug down the pipe to replace it.

sounds like you're still having problems with the clutch. check the clutch arm position on the case, there's 2 marks behind it that it should be between when lightly pulled up.

and petcock, check the vac line for fuel... there shouldn't be any.

Title: Re: Loss of top end and other issues
Post by Tiktok423 on 03/04/15 at 21:32:29

3C2F3839262B2D2F247B4A0 wrote:

thank you, those suggestions seem to cover all the symptoms. i will work thru them and let you all know how i get on. thanks.

Title: Re: Loss of top end and other issues
Post by justin_o_guy2 on 03/05/15 at 04:15:42

Eyeball the Dyna, if you can see through, you're seeing the lack of resistance. If you bought them together, bet they're both ruined if one is.
I never bet against Verslagen, try his way, if you can't make it work, dump the Dyna and buy another..

Title: Re: Loss of top end and other issues
Post by Tiktok423 on 03/10/15 at 21:11:02

Update,

you can see right thru my dynas so it is like a straight pipe, so Im looking at a freeze plug, is 1 1/4 inch the right size?

clutch is working better, clutch arm is resting just above the the bottom line on the motor, but when clutch lever is fully engaged the arm is just above the top mark. is this ok?

havnt got to the petcock yet.

Thanks

Title: Re: Loss of top end and other issues
Post by verslagen1 on 03/10/15 at 22:04:10

5F646E784564786E0B0 wrote:

So on your advise Dave I went out and got a telescopic inspection mirror and checked out the inside of the Dyna muffler. It seems however they punched out the divider the original welds from the factory were left, I measured it at around 1 1/4" and got a high walled freeze plug in that size. It took a bit of patience but I got it in there pretty good, the chamber is tapered getting smaller from the inlet to the outlet so I don't see it coming loose. I went and had my buddy Lee make another intermediate pipe today with revised angles and lengths, I have to have him expand the inlet side a bit, but the length and angles are spot on now :)

Thanks for the advise ;)

http://i792.photobucket.com/albums/yy206/bcrx2/Motorcycles/IMG_20130420_130905_zps0444bfdc.jpg

You can see one side of the plug doesn't look tight.
I don't think you'll be able to tack it in place with a welder.
I would just run a dry wall screw in the loose side.

Title: Re: Loss of top end and other issues
Post by verslagen1 on 03/10/15 at 22:18:50

and apparently the tip comes from the HD forum...

282D2A21262C4F0 wrote:

[quote author=785C5959504758545B0D0705350 link=1342870737/15#22 date=1343174662]ok what did you make that plug out of?

It's the one that came with it. The HD forums say it is an automotive freeze plug/expansion plug. It ~~should be 1.5"/38mm~~ is 1.25". [/quote]

Title: Re: Loss of top end and other issues
Post by Tiktok423 on 03/11/15 at 01:04:44

23302726393432303B64550 wrote:

and apparently the tip comes from the HD forum...

[quote author=282D2A21262C4F0 link=1342870737/15#24 date=1343175212][quote author=785C5959504758545B0D0705350 link=1342870737/15#22 date=1343174662]ok what did you make that plug out of?

It's the one that came with it. The HD forums say it is an automotive freeze plug/expansion plug. It ~~should be 1.5"/38mm~~ is 1.25". [/quote]
[/quote]

thank you im ordering me one tonight. the cheapest i can find in NZ is $33 postage included.

any advice on m clutch? at rest the clutch arm is inbetween the marks, when clutch is fully engaged it is slightly above the top mark. is this ok?

Title: Re: Loss of top end and other issues
Post by Dave on 03/11/15 at 03:00:29

The marks on the clutch are for where the arm should be when you take the slack out.....that gives you reference of the travel available to releas the clutch. There is no reference for where it should be when you pull in the clutch lever....the clutch is released when in that position and the position of the lever is meaningless.

Title: Re: Loss of top end and other issues
Post by Tiktok423 on 03/11/15 at 10:14:17

417A7760717D66607B737E61120 wrote:

thanks