jack667
Scoot Enthusiast
Posts: 190
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Post by jack667 on Oct 7, 2018 19:50:07 GMT -5
I think the weak link in the build is the wrist pin needle bearing if it’s never been replaced. I didn’t see any mention of it being replaced with the bbk. Just try to reduce the urge to over rev it down hill. Gears will bring the willingness to rev into check. I’d recommend 43/13 but if your afraid of losing hill climbing then 15/50 would help. Thanks so much for the comment!! I'm going to start doing the research on the gearing. Thx for that recommendation! We did replace a bearing and I think it may have been the one you're mentioning. However, I had a friend help with the bbk install and I don't know exactly what he did and the name of all the parts, although I was watching. There's a photo of the whole kit online and I magnified it and highlighted the bearing with a red circle. Can you let me know if you think this is the one you're talking about?  |
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jack667
Scoot Enthusiast
Posts: 190
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Post by jack667 on Oct 7, 2018 19:54:47 GMT -5
Remember throttling way back on down hills cuts back the oil supply(with a cable operated oil pump),goosing it every few seconds helps..BBK installers sometimes reset the oil pump for more oiling,OR,go to premix...  I see you said NCY pipe,which one would that be?? Thanks to you (and all!) for the comments. Appreciate the advice on the throttle. I'll pass that on to the boy. We might try pre-mix. I need to look into that... The NCY pipe was in a bundle. Here's a link to the exhaust, and here's a photo on from my bike:  |
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Post by 190mech on Oct 7, 2018 20:01:27 GMT -5
Great pipe!That was first marketed by MRP and is still a strong runner today,that IS the pin bearing that Ryan is talking about,,Ive had failures too,one was an NCY brand..
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Post by ryan_ott on Oct 7, 2018 20:03:33 GMT -5
Yes that’s the bearing in question. I feel better knowing it’s been replaced.
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jack667
Scoot Enthusiast
Posts: 190
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Post by jack667 on Oct 7, 2018 20:27:28 GMT -5
Great pipe!That was first marketed by MRP and is still a strong runner today,that IS the pin bearing that Ryan is talking about,,Ive had failures too, one was an NCY brand.. So glad to hear the good feedback on the pipe. Not sure if I should be concerned about that bearing. I do remember my friend putting it in, and he does know what he's doing. I guess I'll just take the approach for now that 'if it's not broke, don't fix it', and see what happens... Thx! Jack |
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Post by 190mech on Oct 8, 2018 4:12:36 GMT -5
I think a 10mm pin will run a while if its set up perfect,if it develops slight detonation or has poor lubrication the bearing just cant handle it..
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Post by repherence2 on Oct 9, 2018 22:08:37 GMT -5
up and running! im happy for you!
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jack667
Scoot Enthusiast
Posts: 190
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Post by jack667 on Oct 10, 2018 6:59:46 GMT -5
up and running! im happy for you! Thx, and thx for all your advice! It's running really well and I'm still tuning... More to come, especially after some work planned for this weekend. |
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jack667
Scoot Enthusiast
Posts: 190
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Post by jack667 on Oct 16, 2018 6:08:24 GMT -5
I've got everything installed, now. I just put in a 'sport 70' airbox, doppler intake, and Stage 6 reeds. I tried Dr Pulley 5g sliders and it didn't go too well. I ordered an NCY red spring and I'll try them again with that. I have 3 sets of 7g rollers: the ones that came with the scoot, a set that came with the NCY kit, and a set that came with the Malossi MultiVar. And I have the 5g Dr Pulley's. I ordered some 8g Dr Pulleys, so I can go with 5g, 8g, or split them and get 6.5g. Let me know if you have any comments or suggestions - thx I'm going to try and keep track of the changes and results on a document:  |
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Post by ryan_ott on Oct 16, 2018 8:57:44 GMT -5
Keep an eye on that temp, I think your sport air box is flowing better that the stock one causing your jetting to be leaned out. A stock box with the snorkel out flows very well, a few 3/8-1/2” holes can help you fine tune. Or that high temp spike may of been from part throttle which can be corrected with needle height or different needles.
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jack667
Scoot Enthusiast
Posts: 190
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Post by jack667 on Oct 16, 2018 10:44:05 GMT -5
Keep an eye on that temp, I think your sport air box is flowing better that the stock one causing your jetting to be leaned out. A stock box with the snorkel out flows very well, a few 3/8-1/2” holes can help you fine tune. Or that high temp spike may of been from part throttle which can be corrected with needle height or different needles. Thx Ryan! Yes - I am a bit concerned about that. I'm going to be trying some different combinations and I'm sure there's going to be plenty of moving parts. Somehow, I need to limit the changes and narrow in on an ideal set-up. The early feedback on that next line in the chart is not good. My son texted me after getting to school today: "Acceleration was down and at one point I was going 30 on a hill and it wasn’t even Redd". And that hill is the one that's typically the slowest. I think this is the plan: 1. go back to previous CVT setup with Malossi Variator and 7g rollers 2. after 10-15 miles on that setup, check plug to see if it looks light grey / lean. If so, re-jet from 95 to maybe 100 3. watch temp and make sure to stay under 350 4. try to better characterize and diagnose cold start bucking 5. install red spring when it comes in, with 5g Dr Pulley sliders and go from there |
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Post by ryan_ott on Oct 16, 2018 10:52:30 GMT -5
Many piped 2 strokes will need a few minutes to “clear out” on a cold start. Usually the pipes perform better once they get some heat in them.
Try to change just one thing at a time, it’s frustrating but it’ll let you know which way your change is leading you. Have you had a look through the tech section and Brent’s videos? Lots of tuning tips can be found there.
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jack667
Scoot Enthusiast
Posts: 190
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Post by jack667 on Oct 16, 2018 11:17:00 GMT -5
Many piped 2 strokes will need a few minutes to “clear out” on a cold start. Usually the pipes perform better once they get some heat in them. Try to change just one thing at a time, it’s frustrating but it’ll let you know which way your change is leading you. Have you had a look through the tech section and Brent’s videos? Lots of tuning tips can be found there. Ah - good to know about the pipe. I agree on the changes - ideally to do one at a time. I'll go through the tech section again. Thx!! |
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Post by islandscrub on Oct 16, 2018 15:37:42 GMT -5
I have a suggestion to add. You need to put an oil check valve on the oil line if you are still using your oil pump. The dell carbs don't have a check ball built in, so it let's oil into the carb/bowl while it's parked, this leads to hard and smoky starts and eventually a fouled plug. Here is a link to Partzilla showing the oil pump assembly on a 2001 Vino. I ordered part #11 and stuck it in between the pump and carb as shown and it's solved the problem. |
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jack667
Scoot Enthusiast
Posts: 190
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Post by jack667 on Oct 16, 2018 16:53:30 GMT -5
I have a suggestion to add. You need to put an oil check valve on the oil line if you are still using your oil pump. The dell carbs don't have a check ball built in, so it let's oil into the carb/bowl while it's parked, this leads to hard and smoky starts and eventually a fouled plug. Here is a link to Partzilla showing the oil pump assembly on a 2001 Vino. I ordered part #11 and stuck it in between the pump and carb as shown and it's solved the problem. Done - ordered - thx! Awesome! It was hard starting today and my kid was pretty upset about it. Hopefully, that's the issue! Jack |
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