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Derbi GPR Nude

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lukamon
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Joined: 18 May 2007
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PostPosted: 08:12 - 19 Mar 2014    Post subject: Reply with quote
fail. you're not telling me that running a bearing on very thin oil (mixed with petrol, thins it even more) at a rate of a shot glass full every 10 mins (roughly, say 45mpg at 50 - 1, 45mph) is a better environment than in a sealed gearbox being soaked / splashed in oil?
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killa wrote: Im an ass man myself
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P.
Red Rocket



Joined: 14 Feb 2008
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PostPosted: 11:27 - 19 Mar 2014    Post subject: Reply with quote
Does petrol perish the seals, then remove the grease?
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SQL
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Joined: 09 Aug 2012
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PostPosted: 12:26 - 19 Mar 2014    Post subject: Reply with quote
I wouldn't have thought so because the seals are still touched by petrol/oil mix when they are saturated by the crank mixture.

Anyway this is sort of offtopic now Mr. Green
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lukamon
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Joined: 18 May 2007
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PostPosted: 00:52 - 21 Mar 2014    Post subject: Reply with quote
me asking why would suggest that I don't know, and would like to find out. seems like a reasonable question since my version of common sense says the gearbox is obviously a better place to run bearings than a crankcase lubricated by, at best, a fine mist of oil.
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killa wrote: Im an ass man myself
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SQL
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PostPosted: 08:43 - 21 Mar 2014    Post subject: Reply with quote
A fine mist of oil and petrol in my opinion is better as they are constantly lubed then washed

Make a topic in general chat and ask Thumbs Up
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SQL
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Joined: 09 Aug 2012
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PostPosted: 16:42 - 21 Mar 2014    Post subject: Reply with quote
_Iain_ wrote:
lukamon wrote:
me asking why would suggest that I don't know, and would like to find out. seems like a reasonable question since my version of common sense says the gearbox is obviously a better place to run bearings than a crankcase lubricated by, at best, a fine mist of oil.


Ah, so you're telling me I fail when you don't actually know the answer or anything about it yourself?

This keeps getting better.

Please continue with your explanation in a workshop thread

Pass the popcorn


FTFY Mr. Green Thumbs Up
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SQL
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Joined: 09 Aug 2012
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PostPosted: 23:49 - 06 Apr 2014    Post subject: Reply with quote
Update

Head and barrel on now have decent compression Cool

Engine back in the bike when I get a new swingarm spindle

then all the electrics back in

total cost so far including buying the bike around £500 Mr. Green
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SQL
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Joined: 09 Aug 2012
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PostPosted: 22:20 - 11 Apr 2014    Post subject: Hell yea!!!!!!!!!!! Reply with quote
Update!

The engine is in!!!

Potato pictures as was dark but am happy fully rebuilt engine is in and gearbox oil is in as well as exhaust on

https://i.imgur.com/HyHSsp2.jpg

https://i.imgur.com/rJABE3E.jpg

https://i.imgur.com/y7BVM5Y.jpg

https://i.imgur.com/y7BVM5Y.jpg

https://i.imgur.com/PhPEA0yl.jpg

Tomorrows job get the wiring loom in and hooked up! Thumbs Up Thumbs Up Thumbs Up
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SQL
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Joined: 09 Aug 2012
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PostPosted: 22:35 - 13 Apr 2014    Post subject: Reply with quote
Wiring loom is in and almost hooked up

https://i.imgur.com/Jzr5zQ5.jpg

https://i.imgur.com/a6qMu7R.jpg

^^ The only reason i wanted the bike Laughing

https://i.imgur.com/sm6TYtg.jpg

https://i.imgur.com/cVdR7cd.jpg

All in all great job today

Had it spinning over to check compression and we are getting 110 - 115 Psi Dry
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P.
Red Rocket



Joined: 14 Feb 2008
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PostPosted: 22:36 - 13 Apr 2014    Post subject: Reply with quote
You'll want a little more compression if it gets up and running Thumbs Up
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SQL
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Joined: 09 Aug 2012
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PostPosted: 22:39 - 13 Apr 2014    Post subject: Reply with quote
once its run in i'd expect it would be better
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P.
Red Rocket



Joined: 14 Feb 2008
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PostPosted: 22:47 - 13 Apr 2014    Post subject: Reply with quote
SQL wrote:
once its run in i'd expect it would be better


Fuck knows. My KTM is showing 130 at the minute...even with its mayo gearbox Laughing
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SQL
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PostPosted: 22:48 - 13 Apr 2014    Post subject: Reply with quote
I thought over 100 should be ok
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P.
Red Rocket



Joined: 14 Feb 2008
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PostPosted: 22:50 - 13 Apr 2014    Post subject: Reply with quote
SQL wrote:
I thought over 100 should be ok


100 is rebuild territory, anything around 110ish I would start buying bits. 130 or so is what you should aim for on a new rebuild Thumbs Up My RS was around 135.
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SQL
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Joined: 09 Aug 2012
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PostPosted: 22:52 - 13 Apr 2014    Post subject: Reply with quote
Paddy. wrote:
SQL wrote:
I thought over 100 should be ok


100 is rebuild territory, anything around 110ish I would start buying bits. 130 or so is what you should aim for on a new rebuild Thumbs Up My RS was around 135.


New piston in it and rings but the rings were cheap so maybe needs better ones
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SQL
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PostPosted: 23:49 - 13 Apr 2014    Post subject: Reply with quote
Thats on the other bike lol

This is the GPR Nude I bought from Paddy
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SQL
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PostPosted: 09:50 - 20 Apr 2014    Post subject: Reply with quote
Well rain has ruined my chance of getting it running today Sad
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SQL
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Joined: 09 Aug 2012
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PostPosted: 19:43 - 30 Apr 2014    Post subject: Reply with quote
GsxfDumbarse wrote:
oh ahah Very Happy PICS OF TOPBOX NAO


https://i.imgur.com/3EeqhdL.jpg

There you go divvy now I have a good camera phone
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SQL
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PostPosted: 22:10 - 05 May 2014    Post subject: Reply with quote
UPDATE!!!

Wiring loom is in and after charging the battery for a while it spins over after changing the relay =]

Locks were drilled out so I can shut the fuel cap

Just need fuel oil and some hoses for rad then it should be running very productive day
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SQL
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Joined: 09 Aug 2012
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PostPosted: 00:23 - 18 May 2014    Post subject: Reply with quote
IT LIVES!!!!!!!!!!!!!!!!!!!1111111ONE

https://www.dropbox.com/s/cmvmlphtmn9zk4w/2014-05-17%2018.07.16.mp4

Runs so smoothly feels awesome
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BenR
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Joined: 23 Jun 2008
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PostPosted: 00:28 - 18 May 2014    Post subject: Reply with quote
Are you going to change the exhaust at all? Apparently even though Derbi fitted the underseat pipe as standard I have heard they rob power. Good project though & sounds good. Thumbs Up
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Old Thread Alert!

The last post was made 9 years, 348 days ago. Instead of replying here, would creating a new thread be more useful?
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