It is currently Tue Oct 23, 2018 9:28 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 71 posts ]  Go to page Previous  1, 2, 3, 4
Author Message
PostPosted: Tue Mar 20, 2018 2:18 pm 
Offline
Certified Bonneville Nut
Certified Bonneville Nut
User avatar

Joined: Wed May 21, 2008 11:47 pm
Posts: 5999
Location: Philly
Year and Trim: 95 SLE
Thank you!

_________________
Image
95 SLE... a keeper. 241k miles. Low and Slow.
98 Infiniti vq35'd i30: 13.3@104mph, 30MPG Hwy
07 Infiniti G35s 6MT
07 Ducati Monster S2R 800 with DS1000 swap
05 Suzuki DRZ400S
83 Yamaha IT175K
74 Yamaha DT175: brap brap, brap
72 Yamaha DS7: '74 RD250 swap, JL chambers

Info on dropping a 92-99: Here.


Top
 Profile  
 
PostPosted: Fri Apr 20, 2018 9:50 pm 
Offline
Certified Bonneville Nut
Certified Bonneville Nut
User avatar

Joined: Wed May 21, 2008 11:47 pm
Posts: 5999
Location: Philly
Year and Trim: 95 SLE
So unfortunately I toasted my 350 top end. My ignition was 1.85ish (should be 1.8mm or less) when checked after it happened and I ran a bit without realizing the slides were in backwards.. Live and learn. There was a meet coming up about 35 miles away I was dead set on going to. So, I took my old 250 top end, painted it, did a quick polish on the fins and installed with it re-timed to 1.77 BTDC. I screwed up the top end on a Thursday afternoon, had it apart that night, cylinders went back out to Chuck (guy who did the machining) Saturday morning and it was running again, jetted in as a 250, by Saturday night. Chuck is working on the 350 top end and the good news is it wasn't super bad.

Image
Image
Image

The meet got rained out so I took my forks apart for a spring and emulator upgrade. These forks came off of ebay with good stanchions, one sort of polished tube and the other not so much. Since it was all apart, I decided to polish the one and re-do the other. Here's some pics of the process then a comparison of the one leg I got through and what it used to look like. I started at 220, when through 320/400/500/600/800/1000/1500 mostly hand sanding and I used a dremel with directionally wrapped sandpaper to do the tight radii. Then buffed it out. The one leg took about 6 hours.

Image
Image
Image
Image
Image
Image

_________________
Image
95 SLE... a keeper. 241k miles. Low and Slow.
98 Infiniti vq35'd i30: 13.3@104mph, 30MPG Hwy
07 Infiniti G35s 6MT
07 Ducati Monster S2R 800 with DS1000 swap
05 Suzuki DRZ400S
83 Yamaha IT175K
74 Yamaha DT175: brap brap, brap
72 Yamaha DS7: '74 RD250 swap, JL chambers

Info on dropping a 92-99: Here.


Top
 Profile  
 
PostPosted: Sat May 05, 2018 10:53 pm 
Offline
Certified Bonneville Nut
Certified Bonneville Nut
User avatar

Joined: Wed May 21, 2008 11:47 pm
Posts: 5999
Location: Philly
Year and Trim: 95 SLE
The second fork took way longer than the first but it's all together and on the road again.

For the fork rebuild I went with 0.8kg Sonic springs with 10mm of preload, 15w oil at 130mm height and Race Tech emulators with silver spring and 3 turns of pre-load. It feels great so far.

Image
Image
Image

_________________
Image
95 SLE... a keeper. 241k miles. Low and Slow.
98 Infiniti vq35'd i30: 13.3@104mph, 30MPG Hwy
07 Infiniti G35s 6MT
07 Ducati Monster S2R 800 with DS1000 swap
05 Suzuki DRZ400S
83 Yamaha IT175K
74 Yamaha DT175: brap brap, brap
72 Yamaha DS7: '74 RD250 swap, JL chambers

Info on dropping a 92-99: Here.


Top
 Profile  
 
PostPosted: Tue May 08, 2018 9:26 am 
Offline
Resident Gearhead
Resident Gearhead
User avatar

Joined: Thu May 22, 2008 10:40 am
Posts: 1643
Location: West Point
Year and Trim: 2003 SSEi
Well, that sucks! "The slides were in backwards..." - are you talking about the carb throttle slides? If those are in backwards it would be like having the throttle about 1/2 way open. The engine would start racing pretty good once it started! I don't recall, does your bike have the auto-oiler, or do you have to premix the gas? For a road bike I'm guessing auto-oiler. Do you have some way to control the metering of the oil?

I would have spent about 5 minutes on a fork tube then said screw this. I admire your tenacity to do something like that. They look great.

_________________
gweg_b wrote:
People think I'm nuts, but Matt proved it.

Resident Tightwad
Image
Screw you, Photobucket.


Top
 Profile  
 
PostPosted: Tue May 08, 2018 11:17 pm 
Offline
Certified Bonneville Nut
Certified Bonneville Nut
User avatar

Joined: Wed May 21, 2008 11:47 pm
Posts: 5999
Location: Philly
Year and Trim: 95 SLE
Yeah the throttle slides were in the wrong carbs and the cutout that's supposed to be pointed away from the engine was pointed toward it. I think it might have been like that the whole time. I didn't think much of it before since they only go in one way... but they will go in the wrong way in the wrong carb. I could get it to idle ok like that too..

Yep, still have the autolube system. It's hooked up to the throttle cable and it's adjustable. I actually had to back it down to get it within spec. It still smokes pretty good too.

Polishing aluminum.. blows. Lol. I have a tons of hours into my Bonneville stuff.

_________________
Image
95 SLE... a keeper. 241k miles. Low and Slow.
98 Infiniti vq35'd i30: 13.3@104mph, 30MPG Hwy
07 Infiniti G35s 6MT
07 Ducati Monster S2R 800 with DS1000 swap
05 Suzuki DRZ400S
83 Yamaha IT175K
74 Yamaha DT175: brap brap, brap
72 Yamaha DS7: '74 RD250 swap, JL chambers

Info on dropping a 92-99: Here.


Top
 Profile  
 
PostPosted: Thu May 10, 2018 5:47 pm 
Offline
Resident Gearhead
Resident Gearhead
User avatar

Joined: Thu May 22, 2008 10:40 am
Posts: 1643
Location: West Point
Year and Trim: 2003 SSEi
95naSTA wrote:
... they will go in the wrong way in the wrong carb. I could get it to idle ok like that too...
Now that's just weird. Why would they go to the trouble to build a left and a right carb? Maybe to get to the airmix screws and idle speed screws, I reckon. That had to affect your throttle response off the bottom and in the mid-range. WFO wouldn't make much difference, but the slide cutaway does have an impact on the lower end of the metering spectrum. I think that would make it rather rich in that range. Might explain the blackish piston.

And speaking of black, that's what everything turns when buffing aluminum - especially your hands. :)

_________________
gweg_b wrote:
People think I'm nuts, but Matt proved it.

Resident Tightwad
Image
Screw you, Photobucket.


Top
 Profile  
 
PostPosted: Sun May 13, 2018 11:49 pm 
Offline
Certified Bonneville Nut
Certified Bonneville Nut
User avatar

Joined: Wed May 21, 2008 11:47 pm
Posts: 5999
Location: Philly
Year and Trim: 95 SLE
Throttle response off the line was bad but I just thought it was due to the huge pipes meant for a 350-400 on a 250.

I got smart and started using gloves when polishing aluminum.. Also did it all outside.

_________________
Image
95 SLE... a keeper. 241k miles. Low and Slow.
98 Infiniti vq35'd i30: 13.3@104mph, 30MPG Hwy
07 Infiniti G35s 6MT
07 Ducati Monster S2R 800 with DS1000 swap
05 Suzuki DRZ400S
83 Yamaha IT175K
74 Yamaha DT175: brap brap, brap
72 Yamaha DS7: '74 RD250 swap, JL chambers

Info on dropping a 92-99: Here.


Top
 Profile  
 
PostPosted: Thu May 17, 2018 12:46 pm 
Offline
Resident Gearhead
Resident Gearhead
User avatar

Joined: Thu May 22, 2008 10:40 am
Posts: 1643
Location: West Point
Year and Trim: 2003 SSEi
95naSTA wrote:
I got smart and started using gloves when polishing aluminum...
#-o Why didn't I think of that? :lol:

_________________
gweg_b wrote:
People think I'm nuts, but Matt proved it.

Resident Tightwad
Image
Screw you, Photobucket.


Top
 Profile  
 
PostPosted: Thu Aug 09, 2018 12:05 am 
Offline
Certified Bonneville Nut
Certified Bonneville Nut
User avatar

Joined: Wed May 21, 2008 11:47 pm
Posts: 5999
Location: Philly
Year and Trim: 95 SLE
This thing made short use of the redone 350 top end again a couple weeks ago.. this time I had a likely culprit.

Image
Image

That rip was out of direct sight.. The one piston started to melt and it'll likely require an overbore this time. It obviously sucks but I slapped my old 250 top end back an an hour or so after finding the damage and it's back up and running.

I'm in no hurry to get this thing running as a 350 again this season. It's fun as a 250 and I know I can rip on it without it crapping out. That said, I hate not having a quantitative form of measurement not telling me what's up. I have a wideband on my daily bike for efs sake. Widebands don't last long in 2 stroke format and they're not accurate at low RPM (2 strokes sometimes 4 stroke). EGTs are widely used but I really don't want to hack up my JL chambers and add mess to the bike. So, Cylinder Head Temperature it is. I picked up 2 Trail Tech CHT sensors for both cylinders to monitor temps and get an idea of what safe is. The sensors replace the spark plug crush washers. Looking around, they're not super popular on bikes but it seems air cooled engine aviation guys are really into these things.

Image

The things are self powered, have the time and even show max temp. A quick test let me know that my one plug was fouled and once that was addressed, I got a steady 10-15* temperature difference between cylinders. I'll be swapping the sensor leads and then comparing compression to figure that one out. Either way, I'm happy to have something other than plug color to give me a heads up on how the bike is running.

_________________
Image
95 SLE... a keeper. 241k miles. Low and Slow.
98 Infiniti vq35'd i30: 13.3@104mph, 30MPG Hwy
07 Infiniti G35s 6MT
07 Ducati Monster S2R 800 with DS1000 swap
05 Suzuki DRZ400S
83 Yamaha IT175K
74 Yamaha DT175: brap brap, brap
72 Yamaha DS7: '74 RD250 swap, JL chambers

Info on dropping a 92-99: Here.


Top
 Profile  
 
PostPosted: Thu Aug 09, 2018 9:56 am 
Offline
Resident Gearhead
Resident Gearhead
User avatar

Joined: Thu May 22, 2008 10:40 am
Posts: 1643
Location: West Point
Year and Trim: 2003 SSEi
95naSTA wrote:
Either way, I'm happy to have something other than plug color to give me a heads up on how the bike is running.
When it's running. :poke: :)

So are you thinking it sucked a fly or some dirt in there? I suppose, being downstream from the air filter, it could have leaned that cylinder out a bit; the filters probably restrict the intake of air slightly.

_________________
gweg_b wrote:
People think I'm nuts, but Matt proved it.

Resident Tightwad
Image
Screw you, Photobucket.


Top
 Profile  
 
PostPosted: Thu Aug 09, 2018 10:36 am 
Offline
Certified Bonneville Nut
Certified Bonneville Nut
User avatar

Joined: Wed May 21, 2008 11:47 pm
Posts: 5999
Location: Philly
Year and Trim: 95 SLE
Haha. Hey this thing was back up and running within hours of both melt downs.

I’m thinking the one side leaned out but who knows.

_________________
Image
95 SLE... a keeper. 241k miles. Low and Slow.
98 Infiniti vq35'd i30: 13.3@104mph, 30MPG Hwy
07 Infiniti G35s 6MT
07 Ducati Monster S2R 800 with DS1000 swap
05 Suzuki DRZ400S
83 Yamaha IT175K
74 Yamaha DT175: brap brap, brap
72 Yamaha DS7: '74 RD250 swap, JL chambers

Info on dropping a 92-99: Here.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 71 posts ]  Go to page Previous  1, 2, 3, 4

All times are UTC - 5 hours [ DST ]


Related topics
 Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. And another one.. Suzuki DRZ content

95naSTA

18

1458

Tue Aug 07, 2018 10:15 am

Sirius View the latest post

There are no new unread posts for this topic. Meet Ernie... (Diesel Content)

00Beast

16

2625

Sun Nov 27, 2016 11:25 pm

00Beast View the latest post

There are no new unread posts for this topic. I did a thing (warning: Holden content)

[ Go to pageGo to page: 1, 2, 3 ]

haro1225

41

2250

Thu Jan 11, 2018 11:24 pm

Ghosthawk View the latest post

 


Who is online

Users browsing this forum: No registered users and 5 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group


phpBB SEO