Create a thread about your bike.
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benito brz
- Posts: 129
- Joined: Fri Sep 20, 2019 1:26 pm
- Location: France
- Replica: Derbi GPR 50 2003
Aprilia RS4 125 2014
- x 99
- x 92
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by benito brz » Sat Dec 18, 2021 10:44 am
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benito brz
- Posts: 129
- Joined: Fri Sep 20, 2019 1:26 pm
- Location: France
- Replica: Derbi GPR 50 2003
Aprilia RS4 125 2014
- x 99
- x 92
Post
by benito brz » Sat Dec 18, 2021 10:52 am
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benito brz
- Posts: 129
- Joined: Fri Sep 20, 2019 1:26 pm
- Location: France
- Replica: Derbi GPR 50 2003
Aprilia RS4 125 2014
- x 99
- x 92
Post
by benito brz » Sat Dec 18, 2021 1:34 pm
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benito brz
- Posts: 129
- Joined: Fri Sep 20, 2019 1:26 pm
- Location: France
- Replica: Derbi GPR 50 2003
Aprilia RS4 125 2014
- x 99
- x 92
Post
by benito brz » Sat Dec 18, 2021 1:39 pm
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jkv357
- Posts: 239
- Joined: Fri Dec 01, 2017 6:47 am
- Location: WI
- Replica: '99 GPR EBE-075
- x 444
- x 118
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by jkv357 » Mon Dec 20, 2021 7:12 am
Wow - that's a ton of work!
Looking good now!
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benito brz
- Posts: 129
- Joined: Fri Sep 20, 2019 1:26 pm
- Location: France
- Replica: Derbi GPR 50 2003
Aprilia RS4 125 2014
- x 99
- x 92
Post
by benito brz » Mon Dec 20, 2021 7:48 am
jkv357 wrote: ↑Mon Dec 20, 2021 7:12 am
Wow - that's a ton of work!
Looking good now!
Thank you so much jkv
Now I have to adjust my carburator, my principal idle is 100 (90-95 are too low) any advice ?
Also I have coolant leaks from the downside of the cylinder, also from the headgasket , everything is New but its leaking
May I put some silicon paste ?
After fixing all that, just have to fix and paint the fairings and I'm done with it.
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jkv357
- Posts: 239
- Joined: Fri Dec 01, 2017 6:47 am
- Location: WI
- Replica: '99 GPR EBE-075
- x 444
- x 118
Post
by jkv357 » Mon Dec 20, 2021 8:27 am
benito brz wrote: ↑Mon Dec 20, 2021 7:48 am
Thank you so much jkv
Now I have to adjust my carburator,
my principal idle is 100 (90-95 are too low) any advice ?
Also I have
coolant leaks from the downside of the cylinder, also from the headgasket , everything is New but its leaking
May I put some silicon paste ?
After fixing all that, just have to fix and paint the fairings and I'm done with it.
Not sure I'm following about the idle - is it idling at 1000 RPMs or something else?
Did you torque the cylinder? It's possible the mating surfaces are not perfectly flat. I've had engines (heads) that needed the surfaces to be lapped with lapping compound on a very flat surface (Quartz or Granite) in order to get a flat surface that will seal properly.
No matter what, it's going to need to come apart again to cure. Maybe someone has a good fix, but I would start with lapping the surfaces.
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benito brz
- Posts: 129
- Joined: Fri Sep 20, 2019 1:26 pm
- Location: France
- Replica: Derbi GPR 50 2003
Aprilia RS4 125 2014
- x 99
- x 92
Post
by benito brz » Mon Dec 20, 2021 10:33 am
jkv357 wrote: ↑Mon Dec 20, 2021 8:27 am
benito brz wrote: ↑Mon Dec 20, 2021 7:48 am
Thank you so much jkv
Now I have to adjust my carburator,
my principal idle is 100 (90-95 are too low) any advice ?
Also I have
coolant leaks from the downside of the cylinder, also from the headgasket , everything is New but its leaking
May I put some silicon paste ?
After fixing all that, just have to fix and paint the fairings and I'm done with it.
Not sure I'm following about the idle - is it idling at 1000 RPMs or something else?
Did you torque the cylinder? It's possible the mating surfaces are not perfectly flat. I've had engines (heads) that needed the surfaces to be lapped with lapping compound on a very flat surface (Quartz or Granite) in order to get a flat surface that will seal properly.
No matter what, it's going to need to come apart again to cure. Maybe someone has a good fix, but I would start with lapping the surfaces.
When I talk about my idle its about my principal idle jet in the carburator, i must choose the correct idle jet to adjust the carburator
Yes I torqued the cylinder and checked several times but maybe it need to be lapped like you said, the cylinder is new from 2018, but the rest upside and downside is original from the Factory, so it is "old"
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jkv357
- Posts: 239
- Joined: Fri Dec 01, 2017 6:47 am
- Location: WI
- Replica: '99 GPR EBE-075
- x 444
- x 118
Post
by jkv357 » Tue Dec 21, 2021 6:12 am
benito brz wrote: ↑Mon Dec 20, 2021 10:33 am
When I talk about my idle its about
my principal idle jet in the carburator, i must choose the correct idle jet to adjust the carburator
Yes I torqued the cylinder and checked several times but maybe it need to be lapped like you said, the cylinder is new from 2018, but the rest upside and downside is original from the Factory, so it is "old"
What does it do that makes you think the current jet isn't correct?
Have you made adjustments to the idle mixture screw? Can you get it to idle?
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Jaxx
- Posts: 61
- Joined: Wed Jun 19, 2019 1:41 am
- x 41
- x 25
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by Jaxx » Wed Dec 22, 2021 11:59 am
Which carb is this? It looks like Dell'Orto PHBN/PHVA 17.5 to me... Are you sure you're talking about idle jet? Idle jet size should be around 30-36. Size 100 should be main jet.
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