Battle with My Riva 125 - Page 6

fullmetalscooter · 11-25-2012, 07:13 PM

Quote:

Originally Posted by max57

I have been wondering why I don't have ethanol problems. It's the rubber. My carburetor is an old Bing with no rubber parts except a rubber ring at the top, which doesn't touch fuel. And its octane requirements are low.

It well destory old fiberglass tanks but I feel when it come to the carb it would take years to effect the rubber. It all is a matter of age. The old the scooter the more likely it's going to damage it. Anything made in the last 10 years should be good but then I been wrong before. As my girlfrend I wrong about everything .

hayasakiman · 11-29-2012, 05:11 AM

On last few rides, the starter motor engaged upon applying front brake. First I thought the starter cut-off relay or starter button is stuck closed. Removed the relay and pulled on brake, the starter turns over. And it was intermittent at that.

Checked wiring diagram and the scooter. And I found the problem was with the newly installed automotive-starter solenoid. The coil was finding a ground source through inner casing and mounting bracket. So, I made sure the solenoid is insulated.

Now, no more problem.

================================================== ===========

Couple of days ago, I went to a gas station where supposed be selling ethanol free gas. There are faded flags at the station advertising it. Rode up to the pump with 5 gallon tank strapped. The pump has a placard saying it ha 10% of ethanol. ???? WTF. I should have gone inside and ask for detail. But I figured "well, regular gas has been OK so why change?". I left the station and went to Costco for less expensive gas.

hayasakiman · 03-17-2013, 04:05 AM

Pirelli tires (SL26) were installed in July last year. Now the rear tire is bold. It has lasted for 2210 miles while front has a lot of tread left on it. Also, the rear tire picked up a wire or a nail. It has a slow leak. So, I had to buy a tire locally. The shop has very limited selections, 2, for the size. I picked Vee Rubber, VRM134. Made in Thailand. Have any one used this brand/tire? I have never heard of this brand. How well does it perform? I haven't ridden the scoot since the tire change because the exhaust pipe is in need of attention. See below.

The pipe is over at the welder being beefed up, shall be ready tomorrow.

mikeatsparkys · 03-30-2013, 11:42 AM

Awesome thread. I'm clearly new here but I've been lurking this thread for a bit. I have a 2001 XC125 as well. I was having the hot start issue. I ordered the new starter clutch and idle gear assembly. I installed it just a few minutes ago. Here's the problem now.

It starts fine but it sounds like the starter motor is still running when started. It will not idle either.

Do you think the starter motor is actually running or is it possible that the idle gear is actually engaging the starter motor and spinning it?

I'm quite new to working on these, so excuse my ignorance ;)

Again, awesome thread. I admire your determination.

mikeatsparkys · 03-30-2013, 12:06 PM

Quote:

Originally Posted by mikeatsparkys

Awesome thread. I'm clearly new here but I've been lurking this thread for a bit. I have a 2001 XC125 as well. I was having the hot start issue. I ordered the new starter clutch and idle gear assembly. I installed it just a few minutes ago. Here's the problem now.

It starts fine but it sounds like the starter motor is still running when started. It will not idle either.

Do you think the starter motor is actually running or is it possible that the idle gear is actually engaging the starter motor and spinning it?

I'm quite new to working on these, so excuse my ignorance ;)

Again, awesome thread. I admire your determination.

I pulled it apart again and I'm thinking that maybe there is too much pressure on the starter clutch and that's not allowing the starter gear to disengage? Thus still spinning the starter gear while the engine is running. perhaps too much torque on the nut on the primary fixed sheave?

hayasakiman · 03-31-2013, 05:25 AM

The new clutch assembly does not come with lube which is specified by Yamaha, molybdenum-disulphide oil.

I used 50/50 mix of STP and engine oil instead, and it has been trouble free.

Three rollers on clutch assembly should retract due to centrifugal force as the engine starts and run, dis-engaging clutch. Since you have new assembly it is hard to have wrong spring used to prevent rollers to retract.

If your starter motor continued to get voltage as my starter motor has had, you will hear faint mechanical sound. My engine continued to operate normally. It did not hinder idling.

Your idling issue may not be related to starter issue.

The lock nut torque for primary sheave is 40 ft-lb.

hayasakiman · 03-31-2013, 07:31 AM

The exhaust pipe was repaired.

fullmetalscooter · 03-31-2013, 07:48 PM

When it comes to tire I would try online to buy if your local shop has crap . I m guessing you might not get great mileage out of it. I would be more concern to watch how it acts in rain etc.

hayasakiman · 03-31-2013, 10:36 PM

I was going to buy a tire as well as tire spoons online so I can try installing it myself. But the aft tire picked up a wire and developed a slow leak.

I had no choice but to get the tire from a local shop.

I try avoid riding in rain/wet if it's possible.

11-29-2012, 05:11 AM	#77
hayasakiman ^OP Gnarly Adventurer Joined: May 2012 Location: WPB, FL, USA Oddometer: 136	11/28/2012 @15097.7 Re-installed starter solenoid On last few rides, the starter motor engaged upon applying front brake. First I thought the starter cut-off relay or starter button is stuck closed. Removed the relay and pulled on brake, the starter turns over. And it was intermittent at that. Checked wiring diagram and the scooter. And I found the problem was with the newly installed automotive-starter solenoid. The coil was finding a ground source through inner casing and mounting bracket. So, I made sure the solenoid is insulated. Now, no more problem. ================================================== =========== Couple of days ago, I went to a gas station where supposed be selling ethanol free gas. There are faded flags at the station advertising it. Rode up to the pump with 5 gallon tank strapped. The pump has a placard saying it ha 10% of ethanol. ???? WTF. I should have gone inside and ask for detail. But I figured "well, regular gas has been OK so why change?". I left the station and went to Costco for less expensive gas. hayasakiman screwed with this post 11-29-2012 at 07:06 AM

03-17-2013, 04:05 AM	#78
hayasakiman ^OP Gnarly Adventurer Joined: May 2012 Location: WPB, FL, USA Oddometer: 136	03/14/2013 @15666.9 Rear tire Pirelli tires (SL26) were installed in July last year. Now the rear tire is bold. It has lasted for 2210 miles while front has a lot of tread left on it. Also, the rear tire picked up a wire or a nail. It has a slow leak. So, I had to buy a tire locally. The shop has very limited selections, 2, for the size. I picked Vee Rubber, VRM134. Made in Thailand. Have any one used this brand/tire? I have never heard of this brand. How well does it perform? I haven't ridden the scoot since the tire change because the exhaust pipe is in need of attention. See below. The pipe is over at the welder being beefed up, shall be ready tomorrow.

03-31-2013, 05:25 AM	#81
hayasakiman ^OP Gnarly Adventurer Joined: May 2012 Location: WPB, FL, USA Oddometer: 136	The new clutch assembly does not come with lube which is specified by Yamaha, molybdenum-disulphide oil. I used 50/50 mix of STP and engine oil instead, and it has been trouble free. Three rollers on clutch assembly should retract due to centrifugal force as the engine starts and run, dis-engaging clutch. Since you have new assembly it is hard to have wrong spring used to prevent rollers to retract. If your starter motor continued to get voltage as my starter motor has had, you will hear faint mechanical sound. My engine continued to operate normally. It did not hinder idling. Your idling issue may not be related to starter issue. The lock nut torque for primary sheave is 40 ft-lb. hayasakiman screwed with this post 04-26-2013 at 09:34 AM

03-31-2013, 07:31 AM	#82
hayasakiman ^OP Gnarly Adventurer Joined: May 2012 Location: WPB, FL, USA Oddometer: 136	3/31/2013 @15698.5 Exhaust pipe The exhaust pipe was repaired.

03-31-2013, 07:48 PM	#83
fullmetalscooter Let me take this duck off Joined: Apr 2009 Location: BC Oddometer: 2,038	When it comes to tire I would try online to buy if your local shop has crap . I m guessing you might not get great mileage out of it. I would be more concern to watch how it acts in rain etc. __________________ Life's journey is not to arrive at the grave safely in a well preserved body,but rather to skid in sideways totally worn out shouting WHAT A RUSH, WHAT A RIDE. Got to go places to be, people to kill and far to many woman.

03-30-2013, 11:42 AM	#79
mikeatsparkys n00b Joined: Mar 2013 Oddometer: 2	Awesome thread. I'm clearly new here but I've been lurking this thread for a bit. I have a 2001 XC125 as well. I was having the hot start issue. I ordered the new starter clutch and idle gear assembly. I installed it just a few minutes ago. Here's the problem now. It starts fine but it sounds like the starter motor is still running when started. It will not idle either. Do you think the starter motor is actually running or is it possible that the idle gear is actually engaging the starter motor and spinning it? I'm quite new to working on these, so excuse my ignorance ;) Again, awesome thread. I admire your determination.

03-31-2013, 10:36 PM	#84
hayasakiman ^OP Gnarly Adventurer Joined: May 2012 Location: WPB, FL, USA Oddometer: 136	I was going to buy a tire as well as tire spoons online so I can try installing it myself. But the aft tire picked up a wire and developed a slow leak. I had no choice but to get the tire from a local shop. I try avoid riding in rain/wet if it's possible.

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